Dereferencing sliced string literal triggers index out of bounds #14158

Open
Open
Dereferencing sliced string literal triggers index out of bounds#14158
Labels
bugObserved behavior contradicts documented or intended behavior
Milestone
urgent

Description

@Vexu
Vexu
opened on Jan 2, 2023
test {
conststr="foo";
@compileLog(str[1..].*);
}
thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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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
      Dereferencing sliced string literal triggers index out of bounds #14158
      Open
      Open
      Dereferencing sliced string literal triggers index out of bounds#14158
      Labels
      bugObserved behavior contradicts documented or intended behavior
      Milestone
      urgent
      Description
      @Vexu
      Vexu
      opened on Jan 2, 2023
      test {
conststr="foo";
@compileLog(str[1..].*);
}
      thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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, '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
          Dereferencing sliced string literal triggers index out of bounds #14158
          Open
          Open
          Dereferencing sliced string literal triggers index out of bounds#14158
          Labels
          bugObserved behavior contradicts documented or intended behavior
          Milestone
          urgent
          Description
          @Vexu
          Vexu
          opened on Jan 2, 2023
          test {
conststr="foo";
@compileLog(str[1..].*);
}
          thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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, '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
              Dereferencing sliced string literal triggers index out of bounds #14158
              Open
              Open
              Dereferencing sliced string literal triggers index out of bounds#14158
              Labels
              bugObserved behavior contradicts documented or intended behavior
              Milestone
              urgent
              Description
              @Vexu
              Vexu
              opened on Jan 2, 2023
              test {
conststr="foo";
@compileLog(str[1..].*);
}
              thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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              No one assigned
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                bugObserved behavior contradicts documented or intended behavior
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                No projects
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                  None yet
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, '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
                  Dereferencing sliced string literal triggers index out of bounds #14158
                  Open
                  Open
                  Dereferencing sliced string literal triggers index out of bounds#14158
                  Labels
                  bugObserved behavior contradicts documented or intended behavior
                  Milestone
                  urgent
                  Description
                  @Vexu
                  Vexu
                  opened on Jan 2, 2023
                  test {
conststr="foo";
@compileLog(str[1..].*);
}
                  thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    bugObserved behavior contradicts documented or intended behavior
                    Type
                    No type
                    Projects
                    No projects
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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("// 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
                      Dereferencing sliced string literal triggers index out of bounds #14158
                      Open
                      Open
                      Dereferencing sliced string literal triggers index out of bounds#14158
                      Labels
                      bugObserved behavior contradicts documented or intended behavior
                      Milestone
                      urgent
                      Description
                      @Vexu
                      Vexu
                      opened on Jan 2, 2023
                      test {
conststr="foo";
@compileLog(str[1..].*);
}
                      thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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                        Labels
                        bugObserved behavior contradicts documented or intended behavior
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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('^' + ".*" + '

                          Skip to content
                          Dereferencing sliced string literal triggers index out of bounds #14158
                          Open
                          Open
                          Dereferencing sliced string literal triggers index out of bounds#14158
                          Labels
                          bugObserved behavior contradicts documented or intended behavior
                          Milestone
                          urgent
                          Description
                          @Vexu
                          Vexu
                          opened on Jan 2, 2023
                          test {
conststr="foo";
@compileLog(str[1..].*);
}
                          thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            bugObserved behavior contradicts documented or intended behavior
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, '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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                              Dereferencing sliced string literal triggers index out of bounds #14158
                              Open
                              Open
                              Dereferencing sliced string literal triggers index out of bounds#14158
                              Labels
                              bugObserved behavior contradicts documented or intended behavior
                              Milestone
                              urgent
                              Description
                              @Vexu
                              Vexu
                              opened on Jan 2, 2023
                              test {
conststr="foo";
@compileLog(str[1..].*);
}
                              thread 19534 panic: index out of bounds: index 3, len 2
/home/vexu/Documents/zig/zig/src/value.zig:2846:78: 0x7e1bbb0 in elemValueAdvanced (zig)
const bytes = mod.string_literal_bytes.items[str_lit.index..][0..str_lit.len];
^
/home/vexu/Documents/zig/zig/src/value.zig:2811:33: 0x7c0d9b5 in elemValueBuffer (zig)
return elemValueAdvanced(val, mod, index, null, buffer) catch unreachable;
^
/home/vexu/Documents/zig/zig/src/value.zig:1313:57: 0x83a1232 in writeToMemory (zig)
const elem_val = val.elemValueBuffer(mod, elem_i, &elem_value_buf);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:27151:35: 0x85176e2 in bitCastVal (zig)
val.writeToMemory(old_ty, sema.mod, buffer);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31961:78: 0x87996f3 in pointerDerefExtra (zig)
return DerefResult{ .val = try sema.bitCastVal(block, src, tv.val, tv.ty, load_ty, 0) };
^
/home/vexu/Documents/zig/zig/src/Sema.zig:31901:43: 0x84451ce in pointerDeref (zig)
const res = try sema.pointerDerefExtra(block, src, ptr_val, load_ty, true);
^
/home/vexu/Documents/zig/zig/src/Sema.zig:12315:39: 0x800d18b in zirArrayCat (zig)
(try sema.pointerDeref(block, rhs_src, rhs_val, rhs_ty)).?
^
/home/vexu/Documents/zig/zig/src/Sema.zig:894:66: 0x7ddf765 in analyzeBodyInner (zig)
.array_cat => try sema.zirArrayCat(block, inst),
^

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