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Docs are misleading about default-unwind configuration #4495

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Docs are misleading about default-unwind configuration#4495
#4496
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[C] BugThis is a bug. Something isn't working.

Description

@hashcatHitman
hashcatHitman
opened on Dec 9, 2025

I tried this code:

[package.metadata.kani.flags]
default-unwind = 1

using the following command line invocation:

cargo kani

with Kani version: 0.66.0

I expected to see this happen:

Kani runs with the default unwind set to 1.

Instead, this happened:

I get the message:
error: Unknown key type default-unwind

And nothing else happens. This message comes from here:

https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183

I found that this works correctly if I instead do:

[package.metadata.kani.flags]
default-unwind = "1"

I expected it to work because of the workspace example given here:
https://model-checking.github.io/kani/tutorial-loop-unwinding.html

...and the package example given here:
https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml

...which both use 1 instead of "1".

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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
      Skip to content
      Docs are misleading about default-unwind configuration #4495
      Closed
      #4496
      Closed
      Docs are misleading about default-unwind configuration#4495
      #4496
      Labels
      [C] BugThis is a bug. Something isn't working.
      Description
      @hashcatHitman
      hashcatHitman
      opened on Dec 9, 2025
      I tried this code:
      [package.metadata.kani.flags]
default-unwind = 1
      using the following command line invocation:
      cargo kani

      with Kani version: 0.66.0
      I expected to see this happen:
      Kani runs with the default unwind set to 1.
      Instead, this happened:
      I get the message:
      error: Unknown key type default-unwind
      And nothing else happens. This message comes from here:
      https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
      I found that this works correctly if I instead do:
      [package.metadata.kani.flags]
default-unwind = "1"
      I expected it to work because of the workspace example given here:
      https://model-checking.github.io/kani/tutorial-loop-unwinding.html
      ...and the package example given here:
      https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
      ...which both use 1 instead of "1".
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
          Skip to content
          Docs are misleading about default-unwind configuration #4495
          Closed
          #4496
          Closed
          Docs are misleading about default-unwind configuration#4495
          #4496
          Labels
          [C] BugThis is a bug. Something isn't working.
          Description
          @hashcatHitman
          hashcatHitman
          opened on Dec 9, 2025
          I tried this code:
          [package.metadata.kani.flags]
default-unwind = 1
          using the following command line invocation:
          cargo kani

          with Kani version: 0.66.0
          I expected to see this happen:
          Kani runs with the default unwind set to 1.
          Instead, this happened:
          I get the message:
          error: Unknown key type default-unwind
          And nothing else happens. This message comes from here:
          https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
          I found that this works correctly if I instead do:
          [package.metadata.kani.flags]
default-unwind = "1"
          I expected it to work because of the workspace example given here:
          https://model-checking.github.io/kani/tutorial-loop-unwinding.html
          ...and the package example given here:
          https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
          ...which both use 1 instead of "1".
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            [C] BugThis is a bug. Something isn't working.
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              None yet
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              No branches or pull requests
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, 'i');
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
              Skip to content
              Docs are misleading about default-unwind configuration #4495
              Closed
              #4496
              Closed
              Docs are misleading about default-unwind configuration#4495
              #4496
              Labels
              [C] BugThis is a bug. Something isn't working.
              Description
              @hashcatHitman
              hashcatHitman
              opened on Dec 9, 2025
              I tried this code:
              [package.metadata.kani.flags]
default-unwind = 1
              using the following command line invocation:
              cargo kani

              with Kani version: 0.66.0
              I expected to see this happen:
              Kani runs with the default unwind set to 1.
              Instead, this happened:
              I get the message:
              error: Unknown key type default-unwind
              And nothing else happens. This message comes from here:
              https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
              I found that this works correctly if I instead do:
              [package.metadata.kani.flags]
default-unwind = "1"
              I expected it to work because of the workspace example given here:
              https://model-checking.github.io/kani/tutorial-loop-unwinding.html
              ...and the package example given here:
              https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
              ...which both use 1 instead of "1".
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                [C] BugThis is a bug. Something isn't working.
                Type
                No type
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                No projects
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                  No milestone
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                  None yet
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                  No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
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try {
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var changed = false;
trackingParams.forEach(function(p) {
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changed = true;
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(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
                  Skip to content
                  Docs are misleading about default-unwind configuration #4495
                  Closed
                  #4496
                  Closed
                  Docs are misleading about default-unwind configuration#4495
                  #4496
                  Labels
                  [C] BugThis is a bug. Something isn't working.
                  Description
                  @hashcatHitman
                  hashcatHitman
                  opened on Dec 9, 2025
                  I tried this code:
                  [package.metadata.kani.flags]
default-unwind = 1
                  using the following command line invocation:
                  cargo kani

                  with Kani version: 0.66.0
                  I expected to see this happen:
                  Kani runs with the default unwind set to 1.
                  Instead, this happened:
                  I get the message:
                  error: Unknown key type default-unwind
                  And nothing else happens. This message comes from here:
                  https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
                  I found that this works correctly if I instead do:
                  [package.metadata.kani.flags]
default-unwind = "1"
                  I expected it to work because of the workspace example given here:
                  https://model-checking.github.io/kani/tutorial-loop-unwinding.html
                  ...and the package example given here:
                  https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
                  ...which both use 1 instead of "1".
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    [C] BugThis is a bug. Something isn't working.
                    Type
                    No type
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                    No projects
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                      No milestone
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                      None yet
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                      No branches or pull requests
                      Issue actions
                      
, 'i');
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lastUrl = location.href;
setTimeout(tryTheater, 500);
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var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
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} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
                      Skip to content
                      Docs are misleading about default-unwind configuration #4495
                      Closed
                      #4496
                      Closed
                      Docs are misleading about default-unwind configuration#4495
                      #4496
                      Labels
                      [C] BugThis is a bug. Something isn't working.
                      Description
                      @hashcatHitman
                      hashcatHitman
                      opened on Dec 9, 2025
                      I tried this code:
                      [package.metadata.kani.flags]
default-unwind = 1
                      using the following command line invocation:
                      cargo kani

                      with Kani version: 0.66.0
                      I expected to see this happen:
                      Kani runs with the default unwind set to 1.
                      Instead, this happened:
                      I get the message:
                      error: Unknown key type default-unwind
                      And nothing else happens. This message comes from here:
                      https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
                      I found that this works correctly if I instead do:
                      [package.metadata.kani.flags]
default-unwind = "1"
                      I expected it to work because of the workspace example given here:
                      https://model-checking.github.io/kani/tutorial-loop-unwinding.html
                      ...and the package example given here:
                      https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
                      ...which both use 1 instead of "1".
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        [C] BugThis is a bug. Something isn't working.
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
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                          None yet
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                          No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
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function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
                          Skip to content
                          Docs are misleading about default-unwind configuration #4495
                          Closed
                          #4496
                          Closed
                          Docs are misleading about default-unwind configuration#4495
                          #4496
                          Labels
                          [C] BugThis is a bug. Something isn't working.
                          Description
                          @hashcatHitman
                          hashcatHitman
                          opened on Dec 9, 2025
                          I tried this code:
                          [package.metadata.kani.flags]
default-unwind = 1
                          using the following command line invocation:
                          cargo kani

                          with Kani version: 0.66.0
                          I expected to see this happen:
                          Kani runs with the default unwind set to 1.
                          Instead, this happened:
                          I get the message:
                          error: Unknown key type default-unwind
                          And nothing else happens. This message comes from here:
                          https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
                          I found that this works correctly if I instead do:
                          [package.metadata.kani.flags]
default-unwind = "1"
                          I expected it to work because of the workspace example given here:
                          https://model-checking.github.io/kani/tutorial-loop-unwinding.html
                          ...and the package example given here:
                          https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
                          ...which both use 1 instead of "1".
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            [C] BugThis is a bug. Something isn't working.
                            Type
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                              No milestone
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                              None yet
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                              No branches or pull requests
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, '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);
}
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/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
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';
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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');
}
}
});
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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); }
})();
})();
Docs are misleading about default-unwind configuration · Issue #4495 · model-checking/kani · GitHub
                              Skip to content
                              Docs are misleading about default-unwind configuration #4495
                              Closed
                              #4496
                              Closed
                              Docs are misleading about default-unwind configuration#4495
                              #4496
                              Labels
                              [C] BugThis is a bug. Something isn't working.
                              Description
                              @hashcatHitman
                              hashcatHitman
                              opened on Dec 9, 2025
                              I tried this code:
                              [package.metadata.kani.flags]
default-unwind = 1
                              using the following command line invocation:
                              cargo kani

                              with Kani version: 0.66.0
                              I expected to see this happen:
                              Kani runs with the default unwind set to 1.
                              Instead, this happened:
                              I get the message:
                              error: Unknown key type default-unwind
                              And nothing else happens. This message comes from here:
                              https://github.com/model-checking/kani/blob/main/kani-driver/src/args_toml.rs#L151-L183
                              I found that this works correctly if I instead do:
                              [package.metadata.kani.flags]
default-unwind = "1"
                              I expected it to work because of the workspace example given here:
                              https://model-checking.github.io/kani/tutorial-loop-unwinding.html
                              ...and the package example given here:
                              https://model-checking.github.io/kani/usage.html#configuration-in-cargotoml
                              ...which both use 1 instead of "1".
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                [C] BugThis is a bug. Something isn't working.
                                Type
                                No type
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                                No projects
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                                  No branches or pull requests
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