https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77955
Bug ID: 77955
Summary: -Wimplicit-fallthrough=1 issue
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
markus@x4 /tmp % cat fall.c
void bar(int);
void foo(int i) {
switch (i) {
case 1: {
bar(1);
// fall-through
}
case 2:
bar(2);
default:
break;
}
}
markus@x4 /tmp % gcc -Wimplicit-fallthrough=1 -c fall.c
fall.c: In function ‘foo’:
fall.c:6:5: warning: this statement may fall through [-Wimplicit-fallthrough=]
bar(1);
^~~~~~
fall.c:9:3: note: here
case 2:
^~~~
As you can see gcc issues a bogus warning and doesn't warn for the case 2
fallthrough.
