[PATCH] D52401: Remove redundant null pointer check in operator delete

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

In https://reviews.llvm.org/D52401#1243054, @ldionne wrote:

> Was this true pre-C11 too? If not, then this needs to be guarded by `#if _LIBCPP_STD_VER >= 17`, because C++ is only on top of C11 in C++17 and above (Marshall can double-check this).


Thanks for the note. It is true in C89 (http://port70.net/~nsz/c/c89/c89-draft.html). 
"If ptr is a null pointer, no action occurs." Also similar wording in POSIX "If ptr is a null pointer, no action shall occur."


Repository:
  rCXX libc++

https://reviews.llvm.org/D52401