Fix ICE due to mishandling of Aggregate rvalue for raw pointers to trait objects #8731

Job	Run time
write-json-symtab-regression	17m 39s
regression (macos-13)	40m 19s
benchcomp-tests	4m 31s
regression (ubuntu-20.04)	29m 12s
regression (ubuntu-22.04)	28m 20s
regression (macos-14)	29m 7s
documentation	2m 9s
perf	32m 27s
	3h 3m 44s

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