panic when typing x=5:x into GHCi
Summary
In GHCi, version 9.3.20210619:
ghci> x=5:x
ghc: panic! (the 'impossible' happened)
GHC version 9.3.20210619:
nameModule
internal x1_sCB
Call stack:
CallStack (from HasCallStack):
callStackDoc, called at compiler/GHC/Utils/Panic.hs:186:37 in ghc:GHC.Utils.Panic
pprPanic, called at compiler/GHC/Types/Name.hs:323:3 in ghc:GHC.Types.Name
Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug
Expected Behavior
Don't panic