@errorCast runtime safety does not include the name of the error #20170

Closed
Closed
@errorCast runtime safety does not include the name of the error#20170
Labels
error messageThis issue points out an error message that is unhelpful and should be improved.
Milestone
0.17.0

Description

@nektro
nektro
opened on Jun 2, 2024

Zig Version

0.12.0

Steps to Reproduce and Observed Output

pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

Expected Output

thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

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    Labels

    error messageThis issue points out an error message that is unhelpful and should be improved.

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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
      @errorCast runtime safety does not include the name of the error #20170
      Closed
      Closed
      @errorCast runtime safety does not include the name of the error#20170
      Labels
      error messageThis issue points out an error message that is unhelpful and should be improved.
      Milestone
      0.17.0
      Description
      @nektro
      nektro
      opened on Jun 2, 2024
      Zig Version
      0.12.0
      Steps to Reproduce and Observed Output
      pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
      thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

      Expected Output
      thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

      Metadata
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      Assignees
      No one assigned
        Labels
        error messageThis issue points out an error message that is unhelpful and should be improved.
        Type
        No type
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        No projects
          Milestone
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          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
          @errorCast runtime safety does not include the name of the error #20170
          Closed
          Closed
          @errorCast runtime safety does not include the name of the error#20170
          Labels
          error messageThis issue points out an error message that is unhelpful and should be improved.
          Milestone
          0.17.0
          Description
          @nektro
          nektro
          opened on Jun 2, 2024
          Zig Version
          0.12.0
          Steps to Reproduce and Observed Output
          pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
          thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

          Expected Output
          thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            error messageThis issue points out an error message that is unhelpful and should be improved.
            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)) {
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
              @errorCast runtime safety does not include the name of the error #20170
              Closed
              Closed
              @errorCast runtime safety does not include the name of the error#20170
              Labels
              error messageThis issue points out an error message that is unhelpful and should be improved.
              Milestone
              0.17.0
              Description
              @nektro
              nektro
              opened on Jun 2, 2024
              Zig Version
              0.12.0
              Steps to Reproduce and Observed Output
              pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
              thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

              Expected Output
              thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                error messageThis issue points out an error message that is unhelpful and should be improved.
                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)) {
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
                  @errorCast runtime safety does not include the name of the error #20170
                  Closed
                  Closed
                  @errorCast runtime safety does not include the name of the error#20170
                  Labels
                  error messageThis issue points out an error message that is unhelpful and should be improved.
                  Milestone
                  0.17.0
                  Description
                  @nektro
                  nektro
                  opened on Jun 2, 2024
                  Zig Version
                  0.12.0
                  Steps to Reproduce and Observed Output
                  pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
                  thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

                  Expected Output
                  thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    error messageThis issue points out an error message that is unhelpful and should be improved.
                    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)) {
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
                      @errorCast runtime safety does not include the name of the error #20170
                      Closed
                      Closed
                      @errorCast runtime safety does not include the name of the error#20170
                      Labels
                      error messageThis issue points out an error message that is unhelpful and should be improved.
                      Milestone
                      0.17.0
                      Description
                      @nektro
                      nektro
                      opened on Jun 2, 2024
                      Zig Version
                      0.12.0
                      Steps to Reproduce and Observed Output
                      pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
                      thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

                      Expected Output
                      thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        error messageThis issue points out an error message that is unhelpful and should be improved.
                        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)) {
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
                          @errorCast runtime safety does not include the name of the error #20170
                          Closed
                          Closed
                          @errorCast runtime safety does not include the name of the error#20170
                          Labels
                          error messageThis issue points out an error message that is unhelpful and should be improved.
                          Milestone
                          0.17.0
                          Description
                          @nektro
                          nektro
                          opened on Jun 2, 2024
                          Zig Version
                          0.12.0
                          Steps to Reproduce and Observed Output
                          pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
                          thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

                          Expected Output
                          thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            error messageThis issue points out an error message that is unhelpful and should be improved.
                            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)) {
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); }
})();
})();

                              Skip to content
                              @errorCast runtime safety does not include the name of the error #20170
                              Closed
                              Closed
                              @errorCast runtime safety does not include the name of the error#20170
                              Labels
                              error messageThis issue points out an error message that is unhelpful and should be improved.
                              Milestone
                              0.17.0
                              Description
                              @nektro
                              nektro
                              opened on Jun 2, 2024
                              Zig Version
                              0.12.0
                              Steps to Reproduce and Observed Output
                              pubfnmain() !void {
constbar: error{Foo}!i32=@errorCast(foo());
_=&bar;
}
fnfoo() anyerror!i32 {
returnerror.Bar;
}
                              thread 2814343 panic: invalid error code
/test.zig:2:47: 0x10335b4 in main (test)
const bar: error{Foo}!i32 = @errorCast(foo());
^
/home/meghan/.local/share/zig/lib/std/start.zig:511:37: 0x1033504 in posixCallMainAndExit (test)
const result = root.main() catch |err| {
^
/home/meghan/.local/share/zig/lib/std/start.zig:253:5: 0x1033041 in _start (test)
asm volatile (switch (native_arch) {
^
???:?:?: 0x0 in ??? (???)
Aborted (core dumped)

                              Expected Output
                              thread 2814343 panic: invalid error cast: expected error{Foo}, found error.Bar

                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                error messageThis issue points out an error message that is unhelpful and should be improved.
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions