Compiled conditional regex match different with Interpretor, and it throws exception #126556

Description

@longxya

Description

in compiled
Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
It's different with interpretor and source generater.

This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

Reproduction Steps

usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

Expected behavior

----------Compiled results count:0------------
----------Interpreted results count:0------------
#################################################################

Actual behavior

----------Compiled results count:3------------
Compiled: []
Compiled: []
Compiled: []
----------Interpreted results count:0------------
#################################################################
Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
at System.Text.RegularExpressions.MatchCollection.get_Count()
at Program.<Main>$(String[] args)

Regression?

No. Occur in .NET8, too

Known Workarounds

No response

Configuration

No response

Other information

No response

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Metadata

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
    }
    } catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
    })();
    (function(){
    try {
    var __m = "github.com";
    var __re = new RegExp('^' + "github\\.com" + '
    
    Skip to content

    Compiled conditional regex match different with Interpretor, and it throws exception #126556

    Description

    @longxya

    Description

    in compiled
    Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
    It's different with interpretor and source generater.

    This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

    Reproduction Steps

    usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

    Expected behavior

    ----------Compiled results count:0------------
    ----------Interpreted results count:0------------
    #################################################################
    

    Actual behavior

    ----------Compiled results count:3------------
    Compiled: []
    Compiled: []
    Compiled: []
    ----------Interpreted results count:0------------
    #################################################################
    Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
    at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
    at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
    at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
    at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
    at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
    at System.Text.RegularExpressions.MatchCollection.get_Count()
    at Program.<Main>$(String[] args)
    

    Regression?

    No. Occur in .NET8, too

    Known Workarounds

    No response

    Configuration

    No response

    Other information

    No response

    Metadata

    Metadata

    Assignees

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
      Skip to content

      Compiled conditional regex match different with Interpretor, and it throws exception #126556

      Description

      @longxya

      Description

      in compiled
      Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
      It's different with interpretor and source generater.

      This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

      Reproduction Steps

      usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

      Expected behavior

      ----------Compiled results count:0------------
      ----------Interpreted results count:0------------
      #################################################################
      

      Actual behavior

      ----------Compiled results count:3------------
      Compiled: []
      Compiled: []
      Compiled: []
      ----------Interpreted results count:0------------
      #################################################################
      Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
      at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
      at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
      at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
      at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
      at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
      at System.Text.RegularExpressions.MatchCollection.get_Count()
      at Program.<Main>$(String[] args)
      

      Regression?

      No. Occur in .NET8, too

      Known Workarounds

      No response

      Configuration

      No response

      Other information

      No response

      Metadata

      Metadata

      Assignees

      Type

      No type

      Projects

      No projects

        Milestone

        No milestone

        Relationships

        None yet

        Development

        No branches or pull requests

        Issue actions

        , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
        Skip to content

        Compiled conditional regex match different with Interpretor, and it throws exception #126556

        Description

        @longxya

        Description

        in compiled
        Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
        It's different with interpretor and source generater.

        This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

        Reproduction Steps

        usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

        Expected behavior

        ----------Compiled results count:0------------
        ----------Interpreted results count:0------------
        #################################################################
        

        Actual behavior

        ----------Compiled results count:3------------
        Compiled: []
        Compiled: []
        Compiled: []
        ----------Interpreted results count:0------------
        #################################################################
        Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
        at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
        at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
        at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
        at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
        at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
        at System.Text.RegularExpressions.MatchCollection.get_Count()
        at Program.<Main>$(String[] args)
        

        Regression?

        No. Occur in .NET8, too

        Known Workarounds

        No response

        Configuration

        No response

        Other information

        No response

        Metadata

        Metadata

        Assignees

        Type

        No type

        Projects

        No projects

          Milestone

          No milestone

          Relationships

          None yet

          Development

          No branches or pull requests

          Issue actions

          , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
          Skip to content

          Compiled conditional regex match different with Interpretor, and it throws exception #126556

          Description

          @longxya

          Description

          in compiled
          Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
          It's different with interpretor and source generater.

          This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

          Reproduction Steps

          usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

          Expected behavior

          ----------Compiled results count:0------------
          ----------Interpreted results count:0------------
          #################################################################
          

          Actual behavior

          ----------Compiled results count:3------------
          Compiled: []
          Compiled: []
          Compiled: []
          ----------Interpreted results count:0------------
          #################################################################
          Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
          at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
          at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
          at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
          at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
          at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
          at System.Text.RegularExpressions.MatchCollection.get_Count()
          at Program.<Main>$(String[] args)
          

          Regression?

          No. Occur in .NET8, too

          Known Workarounds

          No response

          Configuration

          No response

          Other information

          No response

          Metadata

          Metadata

          Assignees

          Type

          No type

          Projects

          No projects

            Milestone

            No milestone

            Relationships

            None yet

            Development

            No branches or pull requests

            Issue actions

            , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
            Skip to content

            Compiled conditional regex match different with Interpretor, and it throws exception #126556

            Description

            @longxya

            Description

            in compiled
            Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
            It's different with interpretor and source generater.

            This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

            Reproduction Steps

            usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

            Expected behavior

            ----------Compiled results count:0------------
            ----------Interpreted results count:0------------
            #################################################################
            

            Actual behavior

            ----------Compiled results count:3------------
            Compiled: []
            Compiled: []
            Compiled: []
            ----------Interpreted results count:0------------
            #################################################################
            Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
            at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
            at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
            at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
            at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
            at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
            at System.Text.RegularExpressions.MatchCollection.get_Count()
            at Program.<Main>$(String[] args)
            

            Regression?

            No. Occur in .NET8, too

            Known Workarounds

            No response

            Configuration

            No response

            Other information

            No response

            Metadata

            Metadata

            Assignees

            Type

            No type

            Projects

            No projects

              Milestone

              No milestone

              Relationships

              None yet

              Development

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              , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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              Compiled conditional regex match different with Interpretor, and it throws exception #126556

              Description

              @longxya

              Description

              in compiled
              Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
              It's different with interpretor and source generater.

              This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

              Reproduction Steps

              usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

              Expected behavior

              ----------Compiled results count:0------------
              ----------Interpreted results count:0------------
              #################################################################
              

              Actual behavior

              ----------Compiled results count:3------------
              Compiled: []
              Compiled: []
              Compiled: []
              ----------Interpreted results count:0------------
              #################################################################
              Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
              at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
              at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
              at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
              at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
              at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
              at System.Text.RegularExpressions.MatchCollection.get_Count()
              at Program.<Main>$(String[] args)
              

              Regression?

              No. Occur in .NET8, too

              Known Workarounds

              No response

              Configuration

              No response

              Other information

              No response

              Metadata

              Metadata

              Assignees

              Type

              No type

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              No projects

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                No milestone

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                None yet

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                No branches or pull requests

                Issue actions

                , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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                Compiled conditional regex match different with Interpretor, and it throws exception #126556

                Description

                @longxya

                Description

                in compiled
                Use (?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1')) to match abc, results are "","","".
                It's different with interpretor and source generater.

                This situation occured in .NET7、.NET8、.NET9、.NET10, work normally in .NET5 and .NET6.

                Reproduction Steps

                usingSystem;usingSystem.Text.RegularExpressions;{varpattern=@"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";pattern=@"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";varinput="abc";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varregexInterpreted=newRegex(pattern,RegexOptions.None);Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");foreach(MatchmhinregexCompiled.Matches(input)){Console.WriteLine($"Compiled: [{mh.Value}]");}Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");foreach(MatchmhinregexInterpreted.Matches(input)){Console.WriteLine($"Interpreted: [{mh.Value}]");}}Console.WriteLine("#################################################################");{varpattern=@"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";varinput="it not";varregexCompiled=newRegex(pattern,RegexOptions.Compiled);varlen=regexCompiled.Matches(input).Count;}

                Expected behavior

                ----------Compiled results count:0------------
                ----------Interpreted results count:0------------
                #################################################################
                

                Actual behavior

                ----------Compiled results count:3------------
                Compiled: []
                Compiled: []
                Compiled: []
                ----------Interpreted results count:0------------
                #################################################################
                Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
                at Regex2_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
                at Regex2_Scan(RegexRunner, ReadOnlySpan`1)
                at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject)
                at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
                at System.Text.RegularExpressions.MatchCollection.GetMatch(Int32 i)
                at System.Text.RegularExpressions.MatchCollection.get_Count()
                at Program.<Main>$(String[] args)
                

                Regression?

                No. Occur in .NET8, too

                Known Workarounds

                No response

                Configuration

                No response

                Other information

                No response

                Metadata

                Metadata

                Assignees

                Type

                No type

                Projects

                No projects

                  Milestone

                  No milestone

                  Relationships

                  None yet

                  Development

                  No branches or pull requests

                  Issue actions