https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82611
Bug ID: 82611
Summary: Incorrect warning for redundant capture in lambda
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jetanner at usc dot edu
Target Milestone: ---
test.cpp:
int main()
{
int i;
auto a = [=, i](){};
}
Warning produced:
test.cpp: In function ‘int main()’:
test.cpp:4:15: warning: explicit by-copy capture of ‘i’ redundant with by-copy
capture default
auto a = [=, i](){};
variable i is not captured with the '=' because i is not used inside the
lambda, so capturing it explicitly is necessary. However, gcc still reports a
redundant capture.
My use-case is that I capture a std::shared_ptr to prevent it from going out of
scope and deconstructing, even though it is not used directly inside my lambda.
