error: TODO: implement @ptrCast between slices changing the length #20057

Closed
Closed
error: TODO: implement @ptrCast between slices changing the length#20057
Labels
bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
Milestone
0.14.0

Description

@nektro
nektro
opened on May 24, 2024

Zig Version

0.12.0

Steps to Reproduce and Observed Behavior

conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

Expected Behavior

all 1 tests passed.

have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it

Metadata

Metadata

Assignees

No one assigned

    Labels

    bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.

    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("// 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
      error: TODO: implement @ptrCast between slices changing the length #20057
      Closed
      Closed
      error: TODO: implement @ptrCast between slices changing the length#20057
      Labels
      bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
      Milestone
      0.14.0
      Description
      @nektro
      nektro
      opened on May 24, 2024
      Zig Version
      0.12.0
      Steps to Reproduce and Observed Behavior
      conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
      test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

      Expected Behavior
      all 1 tests passed.
      have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
        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("// 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
          error: TODO: implement @ptrCast between slices changing the length #20057
          Closed
          Closed
          error: TODO: implement @ptrCast between slices changing the length#20057
          Labels
          bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
          Milestone
          0.14.0
          Description
          @nektro
          nektro
          opened on May 24, 2024
          Zig Version
          0.12.0
          Steps to Reproduce and Observed Behavior
          conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
          test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

          Expected Behavior
          all 1 tests passed.
          have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
            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
              error: TODO: implement @ptrCast between slices changing the length #20057
              Closed
              Closed
              error: TODO: implement @ptrCast between slices changing the length#20057
              Labels
              bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
              Milestone
              0.14.0
              Description
              @nektro
              nektro
              opened on May 24, 2024
              Zig Version
              0.12.0
              Steps to Reproduce and Observed Behavior
              conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
              test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

              Expected Behavior
              all 1 tests passed.
              have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                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
                  error: TODO: implement @ptrCast between slices changing the length #20057
                  Closed
                  Closed
                  error: TODO: implement @ptrCast between slices changing the length#20057
                  Labels
                  bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                  Milestone
                  0.14.0
                  Description
                  @nektro
                  nektro
                  opened on May 24, 2024
                  Zig Version
                  0.12.0
                  Steps to Reproduce and Observed Behavior
                  conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
                  test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

                  Expected Behavior
                  all 1 tests passed.
                  have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                    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
                      error: TODO: implement @ptrCast between slices changing the length #20057
                      Closed
                      Closed
                      error: TODO: implement @ptrCast between slices changing the length#20057
                      Labels
                      bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                      Milestone
                      0.14.0
                      Description
                      @nektro
                      nektro
                      opened on May 24, 2024
                      Zig Version
                      0.12.0
                      Steps to Reproduce and Observed Behavior
                      conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
                      test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

                      Expected Behavior
                      all 1 tests passed.
                      have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                        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
                          error: TODO: implement @ptrCast between slices changing the length #20057
                          Closed
                          Closed
                          error: TODO: implement @ptrCast between slices changing the length#20057
                          Labels
                          bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                          Milestone
                          0.14.0
                          Description
                          @nektro
                          nektro
                          opened on May 24, 2024
                          Zig Version
                          0.12.0
                          Steps to Reproduce and Observed Behavior
                          conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
                          test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

                          Expected Behavior
                          all 1 tests passed.
                          have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                            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
                              error: TODO: implement @ptrCast between slices changing the length #20057
                              Closed
                              Closed
                              error: TODO: implement @ptrCast between slices changing the length#20057
                              Labels
                              bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                              Milestone
                              0.14.0
                              Description
                              @nektro
                              nektro
                              opened on May 24, 2024
                              Zig Version
                              0.12.0
                              Steps to Reproduce and Observed Behavior
                              conststd=@import("std");
constbuiltin=@import("builtin");
test {
consta: u32=0xCE94C13E;
constb: *constu32=&a;
constc: []constu32=b[0..1];
constd: []constu8=@ptrCast(c);
comptimestd.debug.assert(builtin.target.cpu.arch.endian() ==.little);
trystd.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}
                              test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
const d: []const u8 = @ptrCast(c);
^~~~~~~~~~~

                              Expected Behavior
                              all 1 tests passed.
                              have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                bugObserved behavior contradicts documented or intended behaviorfrontendTokenization, parsing, AstGen, Sema, and Liveness.
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions