Git PowerShell session in Github Windows kept crashing

GitHub for Windows provides the Git Shell via PowerShell, which is great under Windows. Most of my machines works well with it, but on one laptop (Thinkpad X1 carbon) the Git Shell (PowerShell) kept crashing after input a few cmdlets, even like ls, under a git repository, but it didn't crash out of a git repo.

What logs contain the error information, or anyone has clue about the crash?

GitHub for Windows latest (2.3.1) ran on Windows 8/8.1 64bit. However, my another box with the same OS and git / GitHub client works fine.

Event log reported an Application Error (quite general...):

Faulting application name: conhost.exe, version: 6.3.9600.17238, time stamp: 0x53d0cdd9 Faulting module name: msvcrt.dll, version: 7.0.9600.16384, time stamp: 0x5215f944 Exception code: 0xc000041d Fault offset: 0x000000000000193f Faulting process id: 0x2650 Faulting application start time: 0x01cfc50e4c68f5f7 Faulting application path: C:\windows\system32\conhost.exe Faulting module path: C:\windows\system32\msvcrt.dll Report Id: 9ab0281b-3101-11e4-827c-b8763fa7c332 Faulting package full name: Faulting package-relative application ID: