246267 2022-10-10 01:03:40 -0700 [WTF] ASSERT on source pointer before calling memcpy() 2022-10-10 09:15:36 -0700 1 1 1 Unclassified WebKit Web Template Framework WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 246260 P2 Normal --- 1 philn philn darin oldest_to_newest 1904422 0 philn 2022-10-10 01:03:40 -0700 As noted in https://bugs.webkit.org/show_bug.cgi?id=245640 in at least one case memcpy() was being called with a null source pointer in StringImpl::copyCharacters(). We should add an ASSERT there. 1904425 1 pnormand 2022-10-10 01:06:14 -0700 Pull request: https://github.com/WebKit/WebKit/pull/5180 1904437 2 philn 2022-10-10 02:19:34 -0700 *** This bug has been marked as a duplicate of bug 246260 *** 1904505 3 darin 2022-10-10 09:15:36 -0700 Turns out *many* callers are passing nullptr for destination pointer as well as source pointer, so the use of memcpy there is incorrect. I ended up working on a much bigger patch for this, but in the end we might want to land something smaller than what I did.