Fix completions when `type` is not defined #1678

Job	Run time
jstest/lint (ubuntu, >=16,<17.0.0a0, >=4.0.6,<5.0.0a0, >=4)	4m 41s
build (ubuntu, >=16,<17.0.0a0, >=4.0.0,<5.0.0a0, >=4)	3m 6s
smoke source install ubuntu py3.8 lab>=4,<5	1m 41s
atest ubuntu py3.8 r>=4	3m 49s
smoke source install ubuntu py3.11 lab>=4,<5	1m 37s
atest ubuntu py3.11 r>=4	3m 46s
atest macos py3.8 r>=4	6m 39s
atest macos py3.11 r>=4	6m 57s
atest windows py3.8 r>=4	11m 55s
atest windows py3.11 r>=4	10m 32s
smoke ubuntu py3.8	37s
smoke ubuntu py3.11	30s
smoke ubuntu pypypy-3.8	1m 21s
smoke macos py3.8	1m 16s
smoke macos py3.11	1m 4s
smoke macos pypypy-3.8	1m 4s
smoke windows py3.8	1m 32s
smoke windows py3.11	1m 56s
smoke windows pypypy-3.8	4m 1s
	1h 8m 4s

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