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Unlike other types, when lambdas are instanciated, they are recreated from scratch. When an unevaluated lambdas appear in the type of a function, parameter it is instanciated in the wrong declaration context, as parameters are transformed before the function. To support lambda in function parameters, we try to compute whether they are dependant without looking at the declaration context. This is a short term stopgap solution to avoid clang iceing. A better fix might be to inject some kind of transparent declaration with correctly computed dependency for function parameters, variable templates, etc. Fixes llvm#50376 Fixes llvm#51414 Fixes llvm#51416 Fixes llvm#51641 Fixes llvm#54296 Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D121532 (cherry picked from commit 3784e8c)
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resolves llvm#50376