[PATCH] D40743: Make rehash(0) work with ubsan's unsigned-integer-overflow.

[Dan Albert via Phabricator via cfe-commits]

danalbert added inline comments.


================
Comment at: include/__hash_table:2141
         __n = 2;
     else if (__n & (__n - 1))
         __n = __next_prime(__n);
----------------
With `rehash(0)` this is `0 & (0 - 1)`, which triggers 
unsigned-integer-overflow.


Repository:
  rCXX libc++

https://reviews.llvm.org/D40743



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