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SUMMARY:
In the port from sparseml -> llm-compressor, the default start and end epochs were changed from None to -1. This was causing all modifiers without a specific end to immediately terminate.
Changing the default back to None fixed the issue, but also revealed some additional issues with the distillation modifier which was previously not running in the tests
TEST PLAN:
All tests passing, added additional check to unit test for sparsity being maintained after constant pruning (previously we were only testing repeated runs of sparsegpt preserve sparsity)