https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85815
Bug ID: 85815
Summary: incorrect "invalid use of incomplete type" in a lambda
on valid code
Product: gcc
Version: 7.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: v at vsamko dot com
Target Milestone: ---
This valid code:
template<class T>
class A {
static A* INSTANCE;
void foobar();
void moo() {}
};
template<class T>
A<T>* A<T>::INSTANCE = nullptr;
template<class T>
void A<T>::foobar() {
auto x = []() {
INSTANCE->moo();
};
}
(compiled with -Wall)
Gives error:
<source>: In lambda function:
<source>:14:17: error: invalid use of incomplete type 'class A<T>' [-Werror]
INSTANCE->moo();
This compiles fine with Clang and GCC 6, but fails with the error above with
GCC 7 and 8.
