0.542

Analysis changes

• Fix DeprecatedGlobal warning text in cases when the global is deprecated without a suggested alternative
• Fix an off-by-one error in type error text for incorrect use of string.format
• Reduce stack consumption further during parsing, hopefully eliminating stack overflows during parsing/compilation

Runtime changes

• Simplify garbage collection treatment of upvalues, reducing cache misses during sweeping stage and reducing the cost of upvalue assignment (SETUPVAL)
• Simplify garbage collection treatment of sleeping and alive threads, reducing cache misses during sweeping stage
• Simplify management of string buffers, removing redundant linked list operations

Community contributions

• Pass environment scope to autocomplete typechecker by @JohnnyMorganz in #610
• String interpolation by @Kampfkarren in #614

Note on interpolated strings

Support for interpolated strings is marked as experimental in this release as the syntax is being validated for compatibility with editors and future proposals; to use it in command-line tools, pass --fflags=LuauInterpolatedStringBaseSupport to enable it early.