Release 0.506 · luau-lang/luau

Changes

Fix some cases where type checking would overflow the native stack
Improve autocomplete behavior when assigning a partially written function call (not currently exposed through command line tools)
Improve autocomplete type inference feedback for some expressions where previously the type would not be known
Improve quantification performance during type checking for large types
Improve type checking for table literals when the expected type of the table is known because of a type annotation
Fix type checking errors in cases where required module has errors in the resulting type
Fix debug line information for multi-line chained call sequences (#255)
lua_ref can no longer be used with LUA_REGISTRYINDEX to prevent mistakes when migrating Lua FFI (#247)
Fix assertions and possible crashes when executing script code indirectly via metatable dispatch from lua_equal/lua_lessthan/lua_getfield/etc. (#259)
Fix flamegraph scripts to run under Python 2

Add luaL_checkboolean and luaL_optboolean by @MathematicalDessert in #221
Expand vectors to 4 components using compile time switch by @petrihakkinen in #214
Removed LUALIB_API from source file method bodies by @KaleidoDeer in #235
Add LUA_GCCOUNTB option for lua_gc by @petrihakkinen in #254
Fix luaL_sandbox leaving a value on the stack by @petrihakkinen in #253
Allow reconfiguring VM defaults via build defines by @kunitoki in #260
Fix luau_load 'env' to work with absolute stack index & add lua_absindex by @petrihakkinen in #263
Add lua_isvector, luaL_checkvector and luaL_optvector by @petrihakkinen in #261

This release introduces a small breaking change in lua.h (only relevant for embedders) to improve compatibility with Lua/LuaJIT:

lua_newuserdata now takes 2 arguments; lua_newuserdatatagged should be used if the third argument was non-0.