Improve ClassTag handling to avoid invalid ClassTag generation and inference failure#16492

Merged

odersky merged 2 commits intoscala:mainfrom

dotty-staging:fix-ctag-2

Dec 12, 2022

Commits on Dec 9, 2022

Try harder to avoid generating ClassTags for Nothing/Null subtypes
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committed
Special-case ClassTag argument instantiation to avoid failure
smarter
committed