https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70609
Bug ID: 70609
Summary: std::experimental::filesystem::copy fails if the file
size is 0 bytes
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: fruko_eto at hotmail dot com
Target Milestone: ---
#include <experimental/filesystem>
#include <fstream>
int main() {
std::ofstream o("1.txt");
o.close();
std::experimental::filesystem::copy("1.txt", "2.txt");
}
The above code fails and when the exception caught, it gives
filesystem error: cannot copy: Input/output error [1.txt] [2.txt]
generic:5
It also gives the same error when I create the file with touch instead of
std::ofstream. However, it works when I write something to the & save & delete
everything & save again. After these operations even though file looks empty
its size is 1 byte and it works without a problem.
g++ version 5.3.1 20151207 (Red Hat 5.3.1-2)
Fedora 23
Only parameters given to g++ is -std=c++17 and -lstdc++fs
