When I copy videos (probably any large files) in nautilus or with gvfs-copy some of the copies cannot be played back and differ from the original files. This does not happen with cp and I ran memtest on the machine with no errors. I assume that the root cause of the problem lies in the glib2 package possibly caused by gcc 4.7.0. At this moment I cannot give more hints like last working version and it's difficult to track down as this only happens occasionally. A run in valgrind which produced corrupted copies did not show up any errors.

Distribution: Arch Linux

* package version(s)
glib2 2.32.3-1
gvfs 1.12.3-2
gcc 4.7.0-6

Steps to reproduce:

mkdir destination
gvfs-copy folder-with-videos/* destination/
diff -r folder-with-videos destination

Downstream Report: https://bugs.archlinux.org/task/30061