Ensure dictionaries without dynamic superclasses get IPE info
Instance dictionaries without dynamic superclass constraints become StgRhsCon
s, which were not being given source spans based on the Name
of the binder in GHC.Stg.Debug.collectStgRhs
. Now they are, and we actually get source spans pointing to the location of the instance definition if whereFrom
is called on the dictionary.
Resolves #24005 (closed)