https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96997
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> --- The -fdump-tree-gimple-lineno changes between the previous revision and the above one are: --- pr96997.ii.005t.gimple_ 2021-02-16 12:04:49.000000000 -0500 +++ pr96997.ii.005t.gimple 2021-02-16 12:05:28.000000000 -0500 @@ -6,12 +6,12 @@ main () struct allocator D.36274; int D.39876; - [./example.cpp:7:27] std::allocator<char>::allocator ([./example.cpp:7:27] &D.36232); + [./example.cpp:7:40] std::allocator<char>::allocator ([./example.cpp:7:40] &D.36232); [./example.cpp:7:19] try { try { - [./example.cpp:7:27] std::__cxx11::basic_string<char>::basic_string ([./example.cpp:7:27] &D.36233, [./example.cpp:7:27] "str1", &D.36232); + [./example.cpp:7:40] std::__cxx11::basic_string<char>::basic_string ([./example.cpp:7:40] &D.36233, [./example.cpp:7:40] "str1", [/opt/compiler-explorer/gcc-9.3.0/include/c++/9.3.0/bits/basic_string.h:525:59] &D.36232); try { try @@ -30,19 +30,19 @@ main () } finally { - [./example.cpp:7:27] std::allocator<char>::~allocator ([./example.cpp:7:27] &D.36232); + [/opt/compiler-explorer/gcc-9.3.0/include/c++/9.3.0/bits/basic_string.h:525:59] std::allocator<char>::~allocator ([/opt/compiler-explorer/gcc-9.3.0/include/c++/9.3.0/bits/basic_string.h:525:59] &D.36232); } } finally { - [./example.cpp:7:27] D.36232 = {CLOBBER}; + [/opt/compiler-explorer/gcc-9.3.0/include/c++/9.3.0/bits/basic_string.h:525:59] D.36232 = {CLOBBER}; } twice (second time for example.cpp:8).