Issues

• compare_exchange_weak never fails spuriously

  model-checking/kani#5146 · Filter by author 0xalpharush opened on Nov 10, 2026

• Pointer-to-integer casts: Kani proves heap and stack addresses are page-aligned

  model-checking/kani#5145 · Filter by author 0xalpharush opened on Nov 10, 2026

• Loop contracts: loop_modifies with a non-pointer argument crashes Kani (ICE expr.rs:737); &*r gives a misleading E0423

  model-checking/kani#5144 · Filter by author feliperodri opened on Nov 9, 2026

• Writes through an integer-cast pointer that equals a live object's address are dropped (false VERIFICATION SUCCESSFUL); this makes stub_verified unsound for pointer-holding modifies targets and results

  [C] Bug[F] Soundness
  Bug

  model-checking/kani#5143 · Filter by author c-grellois opened on Nov 9, 2026 · Soundness

• Non-nested quantifier predicates can silently discard default checks

  [C] BugZ-Quantifiers
  Bug

  model-checking/kani#5141 · Filter by author v3risec opened on Nov 9, 2026 · Contracts

• Autoharness: types that should be supported (no Arbitrary, trait objects, fn pointers, HashMap, Option<&T>, Pin, tuples with &str)

  Z-Autoharness
  Task

  model-checking/kani#5137 · Filter by author feliperodri opened on Nov 7, 2026 · Autoharness
  1

• Compiler crashes on two custom_mir programs from Miri's test suite

  [F] Crash
  Bug

  model-checking/kani#5132 · Filter by author feliperodri opened on Nov 6, 2026

• Compiler panic on explicit tail calls (become)

  [E] Unsupported Construct[F] Crash
  Bug

  model-checking/kani#5131 · Filter by author feliperodri opened on Nov 6, 2026

• Compiler panic on async closures (rustc_public: Lower these to SMIR)

  [F] CrashZ-Kani Compiler
  Bug

  model-checking/kani#5130 · Filter by author feliperodri opened on Nov 6, 2026

• Misaligned accesses that depend on where an allocation is placed are not detected

  Bug

  model-checking/kani#5129 · Filter by author feliperodri opened on Nov 6, 2026
  

• Alignment check is dropped when debug assertions are off

  [F] Soundness
  Bug

  model-checking/kani#5128 · Filter by author feliperodri opened on Nov 6, 2026 · Soundness
  

• Performance: common std constructs (padded integer formatting, str::parse, recursive drop, Backtrace::capture) time out

  [E] Performance
  Feature

  model-checking/kani#5127 · Filter by author feliperodri opened on Nov 6, 2026
  

• assert! and panic! become ambiguous under cargo kani when the crate glob-imports its own prelude

  [C] Bug
  Bug

  model-checking/kani#5126 · Filter by author feliperodri opened on Nov 6, 2026
  

• Spurious failure: ptr.map_addr(|a| a & 0).addr() is not 0

  [C] Bug[F] Spurious Failure
  Bug

  model-checking/kani#5125 · Filter by author feliperodri opened on Nov 6, 2026

• cargo kani list --format json writes kani-list.json into the package root

  [C] Feature / Enhancement[E] User Experience
  Feature

  model-checking/kani#5124 · Filter by author feliperodri opened on Nov 6, 2026
  

• cargo kani list rejects --target-dir, which cargo kani accepts

  [C] BugT-Good First Issue
  Bug

  model-checking/kani#5123 · Filter by author feliperodri opened on Nov 6, 2026

• cargo kani prints an unstable-feature warning for the injected #![feature(register_tool)] on every run

  [E] User Experience
  Bug

  model-checking/kani#5122 · Filter by author feliperodri opened on Nov 6, 2026

• Unwinding failure is reported inside <builtin-library-memcmp> instead of at the user code that compares slices

  [E] User Experience
  Bug

  model-checking/kani#5121 · Filter by author feliperodri opened on Nov 6, 2026
  

• Replace-mode stubs drop an owned receiver even when the real body moves it out

  [C] Bug[F] Spurious Failure
  Bug

  model-checking/kani#5118 · Filter by author feliperodri opened on Nov 3, 2026 · Contracts
  

• kani-driver uses ~12 GiB on a single harness while CBMC peaks at ~2.3 GiB

  [C] Bug[E] PerformanceT-User
  Bug

  model-checking/kani#5117 · Filter by author Tiramisu-Cake opened on Nov 3, 2026

• Contract attributes on a specialization default fn fail to parse ("expected fn")

  [C] BugZ-Contracts
  Bug

  model-checking/kani#5116 · Filter by author Tiramisu-Cake opened on Nov 3, 2026 · Contracts

• -Z uninit-checks rejects valid atomic stores to uninitialized memory

  [C] Bug[F] Spurious FailureZ-UnstableFeature
  Bug

  model-checking/kani#5114 · Filter by author v3risec opened on Nov 3, 2026
  

• Loop contracts: loop_modifies is ignored at -Zmir-opt-level>=2, and listing a &mut target moves it

  T-High PriorityZ-Contracts
  Bug

  model-checking/kani#5110 · Filter by author feliperodri opened on Nov 3, 2026 · Soundness
  1

• Support concrete playback for the autoharness subcommand

  [C] Feature / EnhancementZ-Autoharness
  Feature

  model-checking/kani#5109 · Filter by author feliperodri opened on Nov 2, 2026 · Concrete Playback
  

• ICE in kani-compiler (body.rs:680 "terminators without a target field") applying loop contracts to a dependency-generated loop (uint 0.9.5 div_mod_knuth)

  [C] Bug[F] CrashZ-Contracts
  Bug

  model-checking/kani#5107 · Filter by author rousjiamo opened on Nov 2, 2026 · Contracts