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[Bug libstdc++/79820] std::ifstream sets errno to zero
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 08 Aug 2017 19:44:14 +0000
- Subject: [Bug libstdc++/79820] std::ifstream sets errno to zero
- Auto-submitted: auto-generated
- References: <bug-79820-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79820
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
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.