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645e131739
fixes #25796 This pull request addresses a subtle type-matching issue in the Nim compiler related to backend type compatibility, particularly for procedures returning `lent` types. It also adds new test cases to ensure correct handling of these scenarios. **Compiler type-checking fix:** * Updated `procParamTypeRel` in `compiler/sigmatch.nim` to skip wrappers like `tyVar`, `tyLent`, `tySink`, and `tyOwned` before comparing backend types, ensuring more accurate type equivalence checks for procedure parameters and return types. **Test coverage improvements:** * Added multiple blocks in `tests/proc/tproc.nim` to test procedure types returning `lent` objects, including cases with constants, variables, and union parameter types, verifying that the compiler now correctly handles these cases. --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>