[release/8.0] Fix type parameter mapping logic in ILLink/ILCompiler #92139
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Backport of #92088 to release/8.0
/cc @sbomer
Customer Impact
Fixes a blocking bug that was causing ILLink to crash. The crash can be observed when using code or dependencies with a certain kind of lambda expression usage. Originally reported in #91880, where it was observed in an empty blazor app with a reference to
LanguageExt.Core
.Testing
Added test coverage for this pattern, and verified that the original repro is fixed.
Risk
Low risk. This only introduces another case to the existing discovery logic.