Stabilize `find_debug_info` #5786

Job	Run time
benchcomp-tests	4m 21s
perf	27m 54s
regression (macos-12)	36m 35s
write-json-symtab-regression	11m 36s
regression (ubuntu-20.04)	19m 55s
regression (ubuntu-22.04)	20m 13s
bookrunner	14m 55s
	2h 15m 29s

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