Fable 5.0.0-rc.6 released!

NewsBot · 31 March 2026 21:18

Fable 5.0.0-rc.6 has been released.

Fixed

[Dart] Enable explicit variable typing for more data types (by @ncave)

[Dart] Fix tests for round, sign, truncate, log, log2, log10, pow, DivRem, Min, Max, Clamp, MinMagnitude, MaxMagnitude, cosh, sinh, tanh, and float Parse (by @ncave)

[Python] Add Math.DivRem support for int, int64, and bigint (by @dbrattli)

[Python] Fix modulo with negative numbers using Python floored semantics instead of .NET truncated semantics for bigint (fixes #4462) (by @dbrattli)

[Beam] Fix System.String.Concat with 4+ arguments not being supported (by @dbrattli)

[TS/Python] Fix thisArg type for overloads in structs (#4453) (by @ncave)

[TS/Python] Fix invalid this argument type in structs (#4453) (by @ncave)

[JS/TS] Fix N format specifier (ToString("N0"), String.Format("{0:N0}", ...)) producing a trailing dot when precision is 0 (fix #2582) (by @MangelMaxime)

[JS/TS] Fix C0 and P0 format specifiers producing trailing dot (e.g., "¤1,000." → "¤1,000") (by @MangelMaxime)

[All] Fix captured side-effect-free values (e.g. empty ResizeArray) being incorrectly inlined into object expression getters in release mode, causing a new instance to be created on each getter call (fixes #3779) (by @MangelMaxime)

[Python] Fix missing await on else branch of ternary expressions in async closures (by @dbrattli)

[Beam] Fix |> ignore on cross-module Emit calls generating variable bindings that shadow Emit case-clause variables (by @dbrattli)

[Beam] Fix containsIdentRef not checking Call ThisArg (by @dbrattli)

[All] Fix CLI color not resetting after error messages (fixes #3755) (by @MangelMaxime)

[JS/TS] StringEnum now respect CompiledValue and CompiledName (by @shayanhabibi)

[JS/TS] Fix invalid syntax emitted when negating negative literals (fix #4251) (by @MangelMaxime)

[Rust] Fix negative counting in CallInfo.GenericArgs (by @ncave)

[Rust] Fix inline bindings and captured idents tracking (by @…

Link: Release 5.0.0-rc.6 · fable-compiler/Fable · GitHub