I was playing on a server then minecraft crashed.

Put the summary of the bug you're having here

What I expected to happen was...:
I expected for minecraft to put me in gamemode 1(creative).

What actually happened was...:
The Minecraft Client Crashed.

Steps to Reproduce:
1. go on a server
2. Go /gamemode 1 and wait for minecraft to crash(50-90) Seconds
3. ...