https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79820
--- Comment #11 from Maurice Bos <m-ou...@m-ou.se> --- (In reply to Jonathan Wakely from comment #7) > The bug title says std::ifstream sets errno to zero, but it should never run > stdio_filebuf::sys_open. Do you have a testcase for this? > > We should still fix it even if it only affects a non-standard extension, but > it's probably not worth backporting if it doesn't affect std::ifstream. I encountered it while using the Catch test framework. Found it with a watchpoint with gdb. Didn't fully inspect the backtrace. It might use some non-standard extensions. I'll check!
