Fixed a recursive inling bug, added a test for it #1332

Job	Run time
build (--mini-tests)	43s
build (--test-libcore)	57s
build (--std-tests)	1m 34s
build (--test-successful-rustc --nb-parts 2 --current-part 0)	1m 52s
build (--test-successful-rustc --nb-parts 2 --current-part 1)	49s
success_gcc12	2s
	5m 57s

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