cb4d9a1902
Normalize region obligation in lexical region resolution with next-gen solver This normalizes region obligations when we `resolve_regions`, since they may be unnormalized with deferred projection equality. It's pretty hard to add tests that exercise this without also triggering MIR borrowck errors (because we don't normalize there yet). I've added one test with two revisions that should test that we both 1. normalize region obligations in the param env, and 2. normalize registered region obligations during lexical region resolution.
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