Fix segmentation failure in ConstantTypeSubstitution #5271
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fixes #5268.
As the
getType(..., true)
should fail with aBUG
, I don't think we need to add anything more than just a check for the type being null. In the example from issue, there is a preceding type error which supresses theBUG_CHECK
about unknown type (as the type map is possibly inconsistent due to previous errors).