Consider the perfectly reasonable name under -XMagicHash: Jn#. This causes an error:
Unable to parse RdrNameStr: "Jn#"
CallStack (from HasCallStack):
error, called at src/GHC/SourceGen/Name/Internal.hs:106:10 in ghc-source-gen-0.4.0.0-5bO8D09FGq6LIxEy1df7VD:GHC.SourceGen.Name.Internal
Consider the perfectly reasonable name under
-XMagicHash
:Jn#
. This causes anerror
: