Vec::leak : Allows "leaking" a vector to obtain a mutable reference that lives for the remainder of the program's life.

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Compare these changes with more recent versions like .

Several new APIs were added to the stable standard library, including:

ASCII character checks (e.g., is_ascii_alphabetic , is_ascii_digit ).

: The compiler was upgraded to LLVM 11 , which brought various performance improvements and better hardware support.

: By default, build dependencies are now built with opt-level = 0 to speed up compilation times.

: The compiler now supports the -C control-flow-guard option for Windows platforms, providing an extra layer of security against memory corruption vulnerabilities.