https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95475
Bug ID: 95475
Summary: Imprecise column number of runtime error in
unreachable program point
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
Target Milestone: ---
$cat test.cc
int main(){
int var = 2;
switch (var) {
case 1:
default:
__builtin_unreachable();
}
}
$cat test.c
int main(){
int var = 2;
switch (var) {
case 1:
default:
__builtin_unreachable();
}
}
$g++ -fsanitize=undefined test.cc ; ./a.out
test.cc:6:34: runtime error: execution reached an unreachable program point
$gcc -fsanitize=undefined test.c ; ./a.out
test.c:6:13: runtime error: execution reached an unreachable program point
In clang-trunk
$clang++ -fsanitize=undefined test.cc ; ./a.out
test.cc:6:13: runtime error: execution reached an unreachable program point
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior test.cc:6:13 in
$clang -fsanitize=undefined test.c ; ./a.out
test.c:6:13: runtime error: execution reached an unreachable program point
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior test.c:6:13 in
$g++ --version
g++ (GCC) 11.0.0 20200526 (experimental)
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This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
