https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70218
Bug ID: 70218
Summary: Illegal access to private fields succeeds with 5/6
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
[forwarded from https://bugs.debian.org/816366]
$ cat foo.cc
#include <thread>
class X {
int i;
};
main() {
X x;
std::thread([&x] { x.i = 3; });
}
g++-4.9 detects access to X::i which is private. Only happens in the specific
combination of a new thread and the lambda expression. g++-5 and g++-6 accept
this.
$ g++-4.9 -std=gnu++11 foo.cc
foo.cc: In lambda function:
foo.cc:3:9: error: 'int X::i' is private
int i;
^
foo.cc:7:26: error: within this context
std::thread([&x] { x.i = 3; });
^
