[COMMITTED] Fix relation query of equivalences.

Andrew MacLeod amacleod@redhat.com
Thu Jun 24 17:34:43 GMT 2021

When looking for relations between equivalencies, a typo was causing the 
same bitmap to be checked for both operands, instead of the correct one 
for each.   This caused us to never notice relations between equivalences.

I also noticed that under some circumstances the relation dump would 
call blocks which were NULL and trap.. Also fixed.

bootstraps on x86_64-pc-linux-gnu with no regressions.  pushed.


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