https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69723
Bug ID: 69723
Summary: Inconsistent report of unused and uninitialized
variables
Product: gcc
Version: 4.9.3
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: [email protected]
Target Milestone: ---
It is here described:
http://stackoverflow.com/questions/35269414/gcc-does-not-warn-variable-set-but-not-used
auto foo() -> void
{
int unused = 0;
unused++;
}
and
auto foo() -> void
{
int x;
int unused;
for ( ; x < 100; x++ ) unused++;
}
do not generate and warnings. Only the -O1 generates an error. I expect
error: variable ‘unused’ set but not used [-Werror=unused-but-set-variable].
error: ‘unused’ and ‘x’ are used uninitialized [-Werror=uninitialized]
