macos

fix: prevent segfault in StringIO#seek with SEEK_END on null device (… #475

Job	Run time
ruby-versions / Generate Ruby versions	4s
macos-13 3.2	30s
macos-13 3.0	40s
macos-13 2.7	1m 1s
macos-13 3.1	30s
macos-13 debug	48s
macos-13 3.3	28s
macos-14 2.7	35s
macos-13 3.4	34s
macos-13 head	29s
macos-14 3.4	17s
macos-14 3.3	18s
macos-14 debug	23s
macos-14 3.1	18s
macos-14 head	19s
macos-14 3.0	18s
macos-14 3.2	17s
	7m 49s

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