https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111918
Bug ID: 111918
Summary: #pragma GCC diagnostic pop does not restore permerror
status of -Wnarrowing
Product: gcc
Version: 13.2.1
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fw at gcc dot gnu.org
CC: dmalcolm at gcc dot gnu.org, jason at gcc dot gnu.org
Target Milestone: ---
Consider this test case:
float f1{123456789};
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"
float f2{123456789};
#pragma GCC diagnostic pop
float f3{123456789};
It reports (with GCC 13.2 and trunk):
t.cc:1:10: error: narrowing conversion of ‘123456789’ from ‘int’ to ‘float’
[-Wnarrowing]
1 | float f1{123456789};
| ^~~~~~~~~
t.cc:6:10: warning: narrowing conversion of ‘123456789’ from ‘int’ to ‘float’
[-Wnarrowing]
6 | float f3{123456789};
| ^~~~~~~~~
I would have expected an error at line 6 because the original diagnostics state
should have been restored by the pop pragma.
This might be a more generic issue, not specific to -Wnarrowing. I see it with
newly added permerrors in the C front end, too.
