Update: this does not involve threads (see new minimal version below).
Also, adding -O2 to the above version (with threading) gives no output,
but creates a SEGV with the version below. Finally, the bug occurs at
compile-time, not link time, since the object file (".o") created from
this also errors when run on CentOS.
#include <functional>
#include <stdio.h>
struct run {
const std::function<void()> &fn;
run(const std::function<void()> &fn_) : fn(fn_) {}
void operator()() {
fn();
}
};
int main() {
auto fn1 = [](){ printf("fn1\n"); };
auto r1 = run(fn1);
auto fn2 = [](){ printf("fn2\n"); };
auto r2 = run(fn2);
r1();
r2();
}
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https://bugs.launchpad.net/bugs/1876958
Title:
Ubuntu-specific pthread issue
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