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From: "gcc at pauldreik dot se" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/111162] New: signed integer overflow triggered by std::chrono::parse Date: Sat, 26 Aug 2023 12:42:13 +0000 [thread overview] Message-ID: <bug-111162-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111162 Bug ID: 111162 Summary: signed integer overflow triggered by std::chrono::parse Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: gcc at pauldreik dot se Target Milestone: --- The following program: #include <chrono> #include <format> #include <sstream> int main() { std::istringstream is("21474837"); std::chrono::minutes x; is >> std::chrono::parse("%8C", x); } invokes undefined behaviour. If compiled with the current gcc trunk, one gets this when executed: /opt/compiler-explorer/gcc-trunk-20230824/include/c++/14.0.0/bits/chrono_io.h:3174:20: runtime error: signed integer overflow: 21474837 * 100 cannot be represented in type 'int' link to reproducer (uses gcc trunk, may go stale quick): https://godbolt.org/z/h617GT4EY
next reply other threads:[~2023-08-26 12:42 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-08-26 12:42 gcc at pauldreik dot se [this message] 2023-08-26 13:52 ` [Bug libstdc++/111162] " redi at gcc dot gnu.org 2023-08-29 12:10 ` redi at gcc dot gnu.org 2023-09-01 10:55 ` cvs-commit at gcc dot gnu.org 2023-09-01 10:57 ` redi at gcc dot gnu.org
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