Put the summary of the bug you're having here
What I expected to happen was...:
I can play on single player or multi player
What actually happened was...:
when i go to play on either single player or multi player but the game chrashes as soon as i launch into either a server or a single player game
Steps to Reproduce:
1. upload any texture pack
2. go to play one either single player or multi player
3. it wont work any you get a crash report on what happened and you can never play unless you use default texture pack
Related issues
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Incomplete without a crash report from ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]
). Please attach it so that we can diagnose your issue.

most recent crash report

Change your version back to the latest one. Downgrading is not, was never and will never be officially supported.