dwarf: do not use `Type.errorSetNames()` for inferred error sets

Otherwise, we risk tripping an assertion in `Type.errorSetNames()`
in case the inferred error set was not yet fully resolved. This so
far only surfaced when Dwarf triggers recursive analysis of an
error set as part of emitting debug info for an error union.
e444e69dc4Jakub Konka committed on 3/27/2022, 6:53:06 PMparent4985abc
1 file changedLine totals unavailable