Split: keep 2 instances of FileLine, for debugging #5045

Job	Run time
community-test (11, windows-latest)	2m 20s
native-image (macOS-12, default)	7m 26s
test (11, windows-latest)	8m 38s
community-test (11, ubuntu-latest)	1m 49s
formatting	21s
native-image (ubuntu-latest, default)	3m 31s
test (11, ubuntu-latest)	7m 11s
native-image (ubuntu-latest, musl)	3m 40s
test (21, windows-latest)	8m 22s
test (21, ubuntu-latest)	6m 15s
dockerize	0s
	49m 33s

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