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Freeze indefinite lists and definite lists when decoding #1561

Job	Run time
continuous-integration (ubuntu-latest, 3.11)	5m 48s
build (ubuntu-latest, 3.12)	36s
build (macos-latest, 3.10)	1s
build (ubuntu-latest, 3.9)	38s
build (ubuntu-latest, 3.13)	38s
build (macos-latest, 3.13)	1s
build (macos-latest, 3.11)	1s
build (ubuntu-latest, 3.10)	41s
build (macos-latest, 3.9)	1s
build (macos-latest, 3.12)	1s
build (ubuntu-latest, 3.11)	51s
	9m 17s

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