[llvm] [llvm-lit] Fix Unhashable TypeError when using lit's internal shell (PR #101590)

[Paul Kirth via llvm-commits]

https://github.com/ilovepi approved this pull request.

Given the fact that only selectively expanding `arg[0]` seems to be causing more expansions and fix ups, I'm OK with the current approach. 

However,  the description is still unclear, despite the template I provided. 

Please include:
1. an example of the command that triggers this error
2. at least one example of where this happens in our codebase
1. conditions for running the test w/ the internal shell 
2. remove "This patch eliminates the 'unhashable type: GlobItem' error." (at most this stops 1 specific instance from occurring).

These details will help others coming by later understand why you're making this change. It's also worth including a link to the RFC to let others know this is part of that effort/cleanup.



https://github.com/llvm/llvm-project/pull/101590