Environment variable loop

[MVV]

I've found nice bug...

Easiest steps to reproduce:

1. open command line and execute command: set xx=%xx%
2. start TC from this command line
3. type into command line: echo %xx%
4. press Enter and enjoy hung TC!

This example is funny, but it is real that some envvars may point to others and back, so loop may occur. I think it would be good to integrate some counter in resolving loop.

[ts4242]

Sorry, what do you mean?
What should %xx% point to?

[ghisler(Author)]

No wonder that this happens when you create an infinite loop...

[MVV]

If I use such construction in BAT file or in command line, this doesn't happen (they don't loop expanding).
I understand that it is a user fault (of course mine in this case) but TC may show some warning mesage instead of hanging.

[ghisler(Author)]

I will set a timeout to the function to prevent it, e.g. to catch loops like xx -> yy -> zz -> xx too.

[MVV]

That's nice. I meant complex loops too when made this topic.

[MVV]

Works fine in TC 7.55pb2. Thanks

[ghisler(Author)]

Thanks for checking!