https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70121
Bug ID: 70121
Summary: spurious warning and crash when returning a reference
from lambda
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: blastrock at free dot fr
Target Milestone: ---
When I try to compile this simple program with gcc 5.3.1:
#include <functional>
int main(int argc, char *argv[])
{
const int val = 28;
auto ff = [&]() -> const int& { return val; };
int i = ff();
}
with the argument -std=c++11, I get the following warning:
warning: returning reference to temporary [-Wreturn-local-addr]
And the program crashes on the int assign statement.
I believe this code is legal, the temporary variable is still valid when the
lambda is called. And the same code compiles without warning and runs without
crash with clang 3.7.
