Debug crash #666

Job	Run time
omnibus compilations, trigger	2s
omnibus compilations, #2	34m 14s
omnibus compilations, #1	29m 22s
omnibus compilations, #3	35m 19s
omnibus compilations, #9	28m 22s
omnibus compilations, #6	28m 48s
omnibus compilations, #8	28m 28s
omnibus compilations, #11	25m 14s
omnibus compilations, #10	30m 2s
omnibus compilations, #4	27m 11s
omnibus compilations, #5	28m 0s
omnibus compilations, #12	14m 48s
omnibus compilations, #7	33m 48s
omnibus compilations, result	4s
	5h 43m 42s

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