ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

Description

@gregg-miskelly

Description

.NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

Reproduction Steps

  1. Create the following program
  2. Using Visual Studio, set a breakpoint where indicated
  3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
  4. View the snapshot
classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

Expected behavior

'MyStringHolder' should be shown as having the largest inclusive size

Actual behavior

ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

Regression?

This worked correctly in .NET 8 preview 3

Known Workarounds

No response

Configuration

I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

Other information

No response

Metadata

Metadata

Assignees

Type

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    , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
     blocks
    (function() {
    function addCopyButtons() {
    document.querySelectorAll('pre code').forEach(function(codeBlock) {
    if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
    codeBlock.parentElement.setAttribute('data-copy-added', 'true');
    var btn = document.createElement('button');
    btn.textContent = 'Copy';
    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;';
    btn.onmouseover = function() { this.style.opacity = '1'; };
    btn.onmouseout = function() { this.style.opacity = '0.7'; };
    btn.onclick = function() {
    navigator.clipboard.writeText(codeBlock.textContent).then(function() {
    btn.textContent = 'Copied!';
    setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
    });
    };
    codeBlock.parentElement.style.position = 'relative';
    codeBlock.parentElement.appendChild(btn);
    });
    }
    addCopyButtons();
    // Re-run on dynamic content
    var observer = new MutationObserver(addCopyButtons);
    observer.observe(document.body, { childList: true, subtree: true });
    })();
    }
    } 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

    ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

    Description

    @gregg-miskelly

    Description

    .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

    Reproduction Steps

    1. Create the following program
    2. Using Visual Studio, set a breakpoint where indicated
    3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
    4. View the snapshot
    classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

    Expected behavior

    'MyStringHolder' should be shown as having the largest inclusive size

    Actual behavior

    ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

    Regression?

    This worked correctly in .NET 8 preview 3

    Known Workarounds

    No response

    Configuration

    I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

    Other information

    No response

    Metadata

    Metadata

    Assignees

    Type

    No type

    Projects

    No projects

      Milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

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

      ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

      Description

      @gregg-miskelly

      Description

      .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

      Reproduction Steps

      1. Create the following program
      2. Using Visual Studio, set a breakpoint where indicated
      3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
      4. View the snapshot
      classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

      Expected behavior

      'MyStringHolder' should be shown as having the largest inclusive size

      Actual behavior

      ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

      Regression?

      This worked correctly in .NET 8 preview 3

      Known Workarounds

      No response

      Configuration

      I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

      Other information

      No response

      Metadata

      Metadata

      Assignees

      Type

      No type

      Projects

      No projects

        Milestone

        Relationships

        None yet

        Development

        No branches or pull requests

        Issue actions

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

        ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

        Description

        @gregg-miskelly

        Description

        .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

        Reproduction Steps

        1. Create the following program
        2. Using Visual Studio, set a breakpoint where indicated
        3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
        4. View the snapshot
        classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

        Expected behavior

        'MyStringHolder' should be shown as having the largest inclusive size

        Actual behavior

        ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

        Regression?

        This worked correctly in .NET 8 preview 3

        Known Workarounds

        No response

        Configuration

        I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

        Other information

        No response

        Metadata

        Metadata

        Assignees

        Type

        No type

        Projects

        No projects

          Milestone

          Relationships

          None yet

          Development

          No branches or pull requests

          Issue actions

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

          ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

          Description

          @gregg-miskelly

          Description

          .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

          Reproduction Steps

          1. Create the following program
          2. Using Visual Studio, set a breakpoint where indicated
          3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
          4. View the snapshot
          classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

          Expected behavior

          'MyStringHolder' should be shown as having the largest inclusive size

          Actual behavior

          ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

          Regression?

          This worked correctly in .NET 8 preview 3

          Known Workarounds

          No response

          Configuration

          I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

          Other information

          No response

          Metadata

          Metadata

          Assignees

          Type

          No type

          Projects

          No projects

            Milestone

            Relationships

            None yet

            Development

            No branches or pull requests

            Issue actions

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

            ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

            Description

            @gregg-miskelly

            Description

            .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

            Reproduction Steps

            1. Create the following program
            2. Using Visual Studio, set a breakpoint where indicated
            3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
            4. View the snapshot
            classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

            Expected behavior

            'MyStringHolder' should be shown as having the largest inclusive size

            Actual behavior

            ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

            Regression?

            This worked correctly in .NET 8 preview 3

            Known Workarounds

            No response

            Configuration

            I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

            Other information

            No response

            Metadata

            Metadata

            Assignees

            Type

            No type

            Projects

            No projects

              Milestone

              Relationships

              None yet

              Development

              No branches or pull requests

              Issue actions

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

              ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

              Description

              @gregg-miskelly

              Description

              .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

              Reproduction Steps

              1. Create the following program
              2. Using Visual Studio, set a breakpoint where indicated
              3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
              4. View the snapshot
              classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

              Expected behavior

              'MyStringHolder' should be shown as having the largest inclusive size

              Actual behavior

              ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

              Regression?

              This worked correctly in .NET 8 preview 3

              Known Workarounds

              No response

              Configuration

              I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

              Other information

              No response

              Metadata

              Metadata

              Assignees

              Type

              No type

              Projects

              No projects

                Milestone

                Relationships

                None yet

                Development

                No branches or pull requests

                Issue actions

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

                ICorDebugGCReferenceEnum.Next fails to return stack references in .NET 8 preview 4 #87239

                Description

                @gregg-miskelly

                Description

                .NET 8 preview 4 seems to have a regression that ICorDebugGCReferenceEnum.Next is no longer returning stack references

                Reproduction Steps

                1. Create the following program
                2. Using Visual Studio, set a breakpoint where indicated
                3. When the breakpoint is hit, take a heap snapshot from the Diagnostics tools window
                4. View the snapshot
                classMyStringHolder{publicreadonlystringValue;publicMyStringHolder(stringvalue){Value=value;}}classProgram{publicstaticvoidMain(){varbigString=newMyStringHolder(newstring('*',1000000));Console.WriteLine(bigString.Value.Length);// breakpoint here}}

                Expected behavior

                'MyStringHolder' should be shown as having the largest inclusive size

                Actual behavior

                ICorDebugGCReferenceEnum.Next is not returning values for all of the stack variables (references with type CorReferenceStack). I see some from the hot reload thread, but none from the 'Main' function.

                Regression?

                This worked correctly in .NET 8 preview 3

                Known Workarounds

                No response

                Configuration

                I am testing with .NET 8 preview 4 on Windows. Both x86 and x64. I didn't test any other architecture or OS.

                Other information

                No response

                Metadata

                Metadata

                Assignees

                Type

                No type

                Projects

                No projects

                  Milestone

                  Relationships

                  None yet

                  Development

                  No branches or pull requests

                  Issue actions