Issues

• diagnostics: no -Wvarargs warning for a va_start second argument that is not the last named parameter

  enhancementleverage:lowseverity:lowsubsystem:diagnostics
  kromych/badc#1891 · Filter by author kromych opened on Nov 3, 2026 · Release 0.4.8 (Bugs)

• linker (PE): a kernel32 function the source declares itself is undefined at link; link.exe and mingw-w64 link kernel32 by default

  bugleverage:mediumos:windowsseverity:mediumsubsystem:linker
  kromych/badc#1890 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• libc (Windows): msvc_compat.h defines InterlockedCompareExchange as a non-atomic int function; the SDK's is an atomic LONG intrinsic

  bugconformanceleverage:mediumos:windowsseverity:criticalsubsystem:libc
  kromych/badc#1889 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• libc (Windows): msvc_compat.h empties __forceinline and __inline, so every SDK FORCEINLINE helper becomes an external definition and two units including <windows.h> do not link

  bugleverage:highos:windowsseverity:highsubsystem:irgensubsystem:libc
  kromych/badc#1888 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• diagnostics: a static main is exempt from -Wunused-function; gcc and clang warn

  bugleverage:lowseverity:lowsubsystem:diagnostics
  kromych/badc#1887 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• preprocessor: -nostdinc keeps badc's intrinsic headers reachable but drops its other compiler headers; gcc and clang drop both

  bugleverage:lowseverity:mediumsubsystem:driversubsystem:preprocessor
  kromych/badc#1886 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• object (PE arm64): .xdata records are written inside the .pdata section, so llvm-readobj misreads or refuses the table

  arch:aarch64bugleverage:mediumos:windowsseverity:lowsubsystem:object
  kromych/badc#1885 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• emission (Windows): an unknown prologue shape silently gets a frameless unwind record; the emitter should record the unwind steps

  bugleverage:highos:windowsseverity:mediumsubsystem:emissionsubsystem:object
  kromych/badc#1884 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• codegen: GNU vector values live in memory and float-vector C arithmetic is scalarized per lane

  enhancementleverage:highseverity:lowsubsystem:emissionsubsystem:ssa
  kromych/badc#1881 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Perf)

• inline asm (AArch64): a 4-byte w operand (float) is refused; gcc and clang bind an s register

  arch:aarch64bugleverage:mediumseverity:mediumsubsystem:emission
  kromych/badc#1880 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• vm: printf %Lf of a 16-byte long double prints 0 under --interp on the Linux targets

  bugleverage:lowos:linuxseverity:mediumsubsystem:vm
  kromych/badc#1879 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• diagnostics: an argument-count error in a __builtin_ library call names the library function, not the builtin spelling

  bugleverage:lowseverity:lowsubsystem:diagnostics
  kromych/badc#1878 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• diagnostics: -Wint-conversion is a warning where gcc 14+ and clang 15+ make it an error by default

  conformanceenhancementleverage:mediumseverity:mediumsubsystem:diagnostics
  kromych/badc#1877 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)
  1

• emission (AArch64): islessgreater is materialized and tested instead of fused into a branch

  arch:aarch64enhancementleverage:lowseverity:lowsubsystem:emission
  kromych/badc#1876 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Perf)

• ssa: a quiet comparison of two floating constants is not folded

  enhancementleverage:lowseverity:lowsubsystem:ssa
  kromych/badc#1875 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Perf)

• vm: <fenv.h> is not implemented under --interp

  enhancementleverage:lowseverity:lowsubsystem:vm
  kromych/badc#1874 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• conformance: the floating relational operators use quiet compares (clang's choice); gcc's signal FE_INVALID on a NaN

  conformanceenhancementleverage:lowseverity:lowsubsystem:emission
  kromych/badc#1873 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• assembler (x86-64): the three-operand umwait and tpause spellings GNU as accepts are rejected

  arch:x86_64enhancementleverage:lowseverity:lowsubsystem:assembler
  kromych/badc#1872 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• linker (PE): a native-subsystem image takes every msvcrt-bound import from ntoskrnl.exe, even for a native user-mode application and for names the kernel does not export

  bugleverage:mediumos:windowsseverity:mediumsubsystem:linker
  kromych/badc#1871 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• vm: the address of a label at the start of the first function equals that function's pointer, so calling it runs the function

  bugleverage:lowseverity:lowsubsystem:vm
  kromych/badc#1870 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• libc (x86-64): the __m64 forms in <emmintrin.h>, <xmmintrin.h> and <tmmintrin.h> are not provided

  arch:x86_64enhancementleverage:mediumseverity:lowsubsystem:libc
  kromych/badc#1867 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• emission (Windows arm64): .xdata records have no epilog scopes

  arch:aarch64bugleverage:lowos:windowsseverity:lowsubsystem:emission
  kromych/badc#1864 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)

• jit (Windows): register unwind data and support SEH in JIT code

  enhancementleverage:mediumos:windowsseverity:mediumsubsystem:jit
  kromych/badc#1860 · Filter by author kromych opened on Nov 2, 2026

• vm: SEH (__try/__except/__finally) for --interp on Windows targets

  enhancementleverage:mediumos:windowsseverity:mediumsubsystem:vm
  kromych/badc#1859 · Filter by author kromych opened on Nov 2, 2026

• irgen (Windows arm64): the trailing arguments of MSVC's five-argument __va_start are not type-checked

  arch:aarch64bugleverage:lowos:windowsseverity:lowsubsystem:irgen
  kromych/badc#1858 · Filter by author kromych opened on Nov 2, 2026 · Release 0.4.8 (Bugs)