[llvm-bugs] [Bug 45843] New: please report invalid use of placement new
via llvm-bugs
llvm-bugs at lists.llvm.org
Fri May 8 09:17:56 PDT 2020
https://bugs.llvm.org/show_bug.cgi?id=45843
Bug ID: 45843
Summary: please report invalid use of placement new
Product: compiler-rt
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: msan
Assignee: unassignedbugs at nondot.org
Reporter: rafael at espindo.la
CC: llvm-bugs at lists.llvm.org
Created attachment 23465
--> https://bugs.llvm.org/attachment.cgi?id=23465&action=edit
testcase
As far as I can tell, basic.life makes this code illegal
new (&x) X(std::move(x));
No one would write that directly, but I have hit that with std::swap(x,x) and a
move assignment operator that was using the move constructor.
The attached file is a case where it would be nice to get a warning. It is the
same testcase given to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94992
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