More uses of HasDebugCallStack
For functions that can fail (with a panic) inside GHC, we use
HasDebugCallStack => in the type to get more info about who called the function. Periodically we add more. They should have no effect in a non-DEBUG compiler.
This ticket is just a peg to hang MRs that add (or remove)
HasDebugCallStack debug traces.
!3597 (closed) added a few
HasDebugCallStacktraces in substitution over Core