Fix tab completion crash #2271

Job	Run time
test-linux	3m 35s
tests (windows-latest)	6m 7s
compiler-tests	57m 24s
builds	13m 3s
tests (macos-latest)	4m 15s
tests (buildjet-4vcpu-ubuntu-2204-arm)	5m 24s
	1h 29m 48s

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