Allow invalid ranges in RngListIter #457

Job	Run time
Build fuzz targets	1m 13s
coverage	1m 14s
bench	1m 31s
build (ubuntu-latest, stable)	47s
build (ubuntu-latest, beta)	54s
cross (i686-unknown-linux-gnu)	47s
build (ubuntu-latest, nightly)	56s
doc	38s
cross (powerpc64-unknown-linux-gnu)	57s
features	2m 57s
build (ubuntu-latest, 1.65.0)	2m 28s
build (stable, macOS-latest)	46s
msrv-read	1m 42s
rustfmt	16s
Run `debug_abbrev` fuzz target	5m 9s
Run `debug_aranges` fuzz target	5m 10s
Run `debug_info` fuzz target	5m 11s
Run `debug_line` fuzz target	5m 5s
Run `eh_frame` fuzz target	5m 5s
Run `eh_frame_hdr` fuzz target	5m 8s
	47m 54s

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