Release 0.504 · luau-lang/luau

Changes

Type mismatch errors now show detailed information for compound types, highlighting the mismatching component
Fix string.pack bug on ARM when packing negative numbers using unsigned formats (#171)
Implement bit32.countlz/countrz (RFC #89)
Minor compiler throughput optimization (~2% faster compilation)
Improve transpiler behavior for edge cases and better test coverage (not exposed through CLI at the moment)
Improve error recovery when parsing invalid assignments
Build fixes for fuzzing targets
Add lua_getthreaddata/lua_setthreaddata to be able to associate custom data with coroutines

Fold length operations when argument is a constant string by @bmcq-0 in #141
Look for .luau before .lua in REPL & Analyze (#97) by @Kittenz in #124
Fix CLI analysis reporting wrong file names by @Rerumu in #146
Add userdata to lua_Callbacks by @LoganDark in #168
Don't allow registry to be set to readonly by @LoganDark in #184
Remove Roblox-specific mutable globals by @LoganDark in #185
Save bytecode to file through CLI by @NotDSF in #170
Feature: Web REPL using Emscripten by @MathematicalDessert in #138
Fixes IFTODT error while compiling from an android device by @ThePotato97 in #199