https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102557
--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> --- Semi-reduced testcase for the reference: #include <sstream> void test01 (char *mname) { std::istringstream iss; iss.str (mname); iss.str (mname); } % g++-12.0.0 -std=c++20 -O3 -fopenacc --param max-inline-insns-single=2 --param modref-max-accesses=2 --param uninlined-function-time=999998 -c ujd9xqvr.cc g++-12.0.0: internal compiler error: Segmentation fault signal terminated program cc1plus