Issues

• ICE: Sys_error "No such file or directory" when building with --target llvm (std bundle dir is named native, not llvm)

  bugICE
  moonbitlang/moonbit-docs#1327 · Filter by author OrisGo opened on Oct 13, 2026

• moonc folds x + 0.0 to x, which is wrong for x = -0.0 (IEEE 754 6.3), on every backend

  moonbitlang/moonbit-docs#1328 · Filter by author KCN-judu opened on Oct 13, 2026
  1

  

• Native release: UInt taken from UInt? is treated as signed (to_uint64 sign-extends, >> is arithmetic)

  moonbitlang/moonbit-docs#1326 · Filter by author KCN-judu opened on Oct 13, 2026
  2

  

• ICE: native debug Array::push of #valtype record with enum fails in lower_array_make

  bug
  moonbitlang/moonbit-docs#1322 · Filter by author jtenner opened on Oct 8, 2026
  

• Vscode plugin should pick moon binary from PATH

  moonbitlang/moonbit-docs#1314 · Filter by author kaashyapan opened on Sep 11, 2026
  

• implicit_impl_as_method (E0079): the suggested pub extend fix often doesn't compile (tuples → E4024, qualified path → E4020)

  bug
  moonbitlang/moonbit-docs#1292 · Filter by author bobzhang opened on Jul 21, 2026
  2

  

• ICE: native test link fails when layout table exceeds 22-bit offset

  moonbitlang/moonbit-docs#1289 · Filter by author mizchi opened on Jul 20, 2026
  1

  

• Wasm backend miscompiles a #valtype struct with a Double first field returned from a raise function (i32.wrap_i64 expected i64, found f64)

  moonbitlang/moonbit-docs#1274 · Filter by author mizchi opened on Jun 26, 2026
  

• ICE: output_value: integer cannot be read back on 32-bit platform

  bugICE
  moonbitlang/moonbit-docs#1272 · Filter by author vigoo opened on Jun 24, 2026
  1

  

• Primitive Bytes == Bytes in a contracted function generates invalid WhyML typing

  moonbitlang/moonbit-docs#1258 · Filter by author mingyang91 opened on Jun 12, 2026
  

• Contracts over mutable wrapper functions reject mut-field reads and writes

  moonbitlang/moonbit-docs#1257 · Filter by author mingyang91 opened on Jun 12, 2026
  

• Proof contracts reject lookup-based replay theorem shapes

  moonbitlang/moonbit-docs#1256 · Filter by author mingyang91 opened on Jun 12, 2026
  

• describe Ref[T] ABI guarantee for native backend

  documentationStale
  moonbitlang/moonbit-docs#1239 · Filter by author Yoorkin opened on May 19, 2026

• [BUG] VSCode Extension: Environment variables not fully provided when spawning native commands

  moonbitlang/moonbit-docs#1236 · Filter by author chawyehsu opened on May 18, 2026
  

• moonc prove: wildcard _ in #proof_pure match arms generates broken WhyML

  moonbitlang/moonbit-docs#1175 · Filter by author dowdiness opened on Apr 12, 2026
  1

  

• #borrow() is a no-op on closure parameters — does not eliminate per-call RC overhead

  moonbitlang/moonbit-docs#1168 · Filter by author bikallem opened on Apr 1, 2026
  1

  

• Native backend lacks Common Subexpression Elimination (CSE) for struct field access

  moonbitlang/moonbit-docs#1165 · Filter by author bikallem opened on Mar 25, 2026
  

• Native target: array length silently truncated to 28 bits, causing SIGABRT for allocations >= 256MB

  moonbitlang/moonbit-docs#1155 · Filter by author bikallem opened on Mar 15, 2026
  2

  

• Any plans to publish Wasm version of moonbit-lsp?

  moonbitlang/moonbit-docs#1145 · Filter by author seiyab opened on Mar 7, 2026
  1

  

• moonbit插件报各种无法引用缺陷-2026/01/02

  moonbitlang/moonbit-docs#1091 · Filter by author windyuuy opened on Jan 2, 2026
  

• document lexing rules

  documentation
  moonbitlang/moonbit-docs#1085 · Filter by author Yoorkin opened on Dec 24, 2025
  

• Supplement to the installation instructions

  moonbitlang/moonbit-docs#1080 · Filter by author klaseca opened on Dec 17, 2025
  

• moonbit vscode error: moon build finishes okay but vscode extension reports error

  moonbitlang/moonbit-docs#1067 · Filter by author bikallem opened on Dec 6, 2025
  

• [vscode] Multiple moon.mod.json project broken with select backend

  bugmoonbit-lsp
  moonbitlang/moonbit-docs#1031 · Filter by author mizchi opened on Nov 2, 2025
  

• Moving around packages is a bit tedious & error prone

  moonbitlang/moonbit-docs#1014 · Filter by author tonyfettes opened on Oct 17, 2025
  1