Comment 2 for bug 1421508

StacktraceTop:
 expand_exec_macros (launching=<optimized out>, gfiles=<optimized out>, kf=<optimized out>, full_desktop_path=<optimized out>, app=<optimized out>) at base/fm-app-info.c:92
 do_launch (appinfo=0xb7d56300, full_desktop_path=0xb7a8a848 "", kf=0xb7c23e00, inp=0xbfccef24, ctx=0xb7ce6d50, err=0xbfccefa8) at base/fm-app-info.c:246
 fm_app_info_launch (appinfo=0xbfccefa8, files=0x0, launch_context=0xb7ce6d50, error=0xbfccefa8) at base/fm-app-info.c:362
 fm_app_info_launch_uris (appinfo=0xb7d85628, uris=<optimized out>, launch_context=0xb7ce6d50, error=0xbfccefa8) at base/fm-app-info.c:443
 fm_launch_desktop_entry (ctx=0xb7ce6d50, file_or_id=0xb7d49f78 "/usr/share/applications/unity-lens-photos.desktop", uris=0x0, launcher=0xbfccf0f4, user_data=0xbfccf0e8) at base/fm-file-launcher.c:82