How to reproduce:

1. Press Add a game
2. Add a non-Steam games
3. Browse
4. Select home directory
5. Change file type dropdown menu to all files

It crashes there

System specs:

Processor Information:
Vendor: GenuineIntel
CPU Family: 0x6
CPU Model: 0x3a
CPU Stepping: 0x9
CPU Type: 0x0
Speed: 2501 Mhz
4 logical processors
2 physical processors
HyperThreading: Supported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported

Network Information:
Network Speed:

Operating System Version:
Ubuntu 14.04 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 3.13.0-45-generic
X Server Vendor: The X.Org Foundation
X Server Release: 11501000
X Window Manager: Openbox
Steam Runtime Version: steam-runtime-release_2015-01-06

Video Card:
Driver: NVIDIA Corporation GeForce GT 630M/PCIe/SSE2

Driver Version:  4.4.0 NVIDIA 331.113
OpenGL Version: 4.4
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 59 Hz
VendorID:  0x10de
DeviceID:  0xde9
Number of Monitors:  2
Number of Logical Video Cards:  2
Primary Display Resolution:  1366 x 768
Desktop Resolution: 1366 x 768
Primary Display Size: 18.19" x 10.24"  (20.87" diag)
                                        46.2cm x 26.0cm  (53.0cm diag)
Primary Bus: PCI Express 16x
Primary VRAM: 2048 MB
Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
Audio device: Intel PantherPoint HDMI

Memory:
RAM: 3839 Mb

Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 148241 Mb
Largest Free Hard Disk Block: 14392 Mb

Installed software:

Recent Failure Reports:
Tue Feb 17 10:18:51 2015 GMT: file ''/tmp/dumps/assert_20150217171819_47.dmp'', upload yes: ''CrashID=bp-b90272e9-fcd9-491f-9a9a-b02252150217''
Tue Feb 17 10:23:23 2015 GMT: file ''/tmp/dumps/assert_20150217162432_1.dmp'', upload yes: ''CrashID=bp-cc999e78-5b7a-465d-ac21-9b83e2150217''
Tue Feb 17 10:31:40 2015 GMT: file ''/tmp/dumps/assert_20150217173129_23.dmp'', upload yes: ''CrashID=bp-754622bf-9125-47dd-9e4e-9d72d2150217''
Tue Feb 17 10:32:57 2015 GMT: file ''/tmp/dumps/assert_20150217172323_1.dmp'', upload no: ''Couldn't connect to server''
Tue Feb 17 10:35:42 2015 GMT: file ''/tmp/dumps/assert_20150217173452_1.dmp'', upload yes: ''CrashID=bp-d14a2256-f5be-41ee-8832-7ba4e2150217''
Tue Feb 17 10:40:22 2015 GMT: file ''/tmp/dumps/assert_20150217173907_1.dmp'', upload yes: ''CrashID=bp-8f3ed730-5512-4524-bd89-0e88c2150217''

Terminal log: https://gist.github.com/minecraft2048/3bf58244ce9053a5f195