Got the leak! Use proper frame deallocation routine

3 jobs for frame-free-fix in 10 minutes and 34 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #150726
docker
build_linux_36

00:05:40

95.0%
passed #150725
macosx
build_macosx_36

00:04:54

95.0%
failed #150724
docker
build_linux_36

00:04:33