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12ba87b996
Miri call ABI check: ensure type size+align stay the same We should almost certainly not accept calls where caller and callee disagree on the size or alignment of the type. The checks we do *almost* imply that, except that `ScalarPair` types can have `repr(align)` and thus differ in size/align even when they are pairs of the same primitive type. r? ``@oli-obk``