swift

05aeed63 - Revert "[GSB] When adding same-type requirements pick representative based on canonical order"

Revert "[GSB] When adding same-type requirements pick representative based on canonical order" This reverts commit c725660cc9d69174809c214cf39d82fd8f807c33. It uncovered a use-after-free in the GenericSignatureBuilder. Apologies for the lack of a test case here; I'm still looking for something small enough to commit. Fixes rdar://problem/46772328.