trait_selection: fix type-const eval ICE #152040
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JohnTitor
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Feb 3, 2026
| if !type_const_stack.insert(uv.def) { | ||
| let guar = tcx.dcx().span_err( | ||
| tcx.def_span(uv.def), | ||
| "cycle detected when evaluating type-level constant", |
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I'm not sure if we should detect a cyclic error in this place though, maybe we can handle it better?
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Fixes #151631
r? @fmease
I'd recommend reviewing commit-by-commit, the diff is less-readable to address a cyclic issue.