https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94906
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:45a6686e76bfcd48f7c72a23d0e15186f76b4bfc commit r9-8588-g45a6686e76bfcd48f7c72a23d0e15186f76b4bfc Author: Jonathan Wakely <jwak...@redhat.com> Date: Tue May 12 09:54:44 2020 +0100 libstdc++: Fix incorrect size calculation in PMR resource (PR 94906) Calculating the size of a chunk being returned to the upstream allocator was done with a 32-bit type, so it wrapped if the chunk was 4GB or larger. I don't know how to test this without allocating 4GB, so there's no test in the testsuite. It has been tested manually of course. Backport from mainline 2020-05-04 Jonathan Wakely <jwak...@redhat.com> PR libstdc++/94906 * src/c++17/memory_resource.cc (monotonic_buffer_resource::_Chunk::release): Use size_t for shift operands.
