27d0e54705
The decorator downleveling transform patches `ts.EmitResolver.isReferencedAliasDeclaration` to prevent elision of value imports that occur only in a type-position, which would inadvertently install the patch repeatedly for each source file in the program. This could potentially result in a stack overflow when a very large number of files is present in the program. This commit fixes the issue by ensuring that the patch is only applied once. This is also a slight performance improvement, as `isReferencedAliasDeclaration` is no longer repeatedly calling into all prior installed patch functions. Fixes #40276 PR Close #40374
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