Fix FrameInfo#block_identifier #413

Job	Run time
ruby-versions / Generate Ruby versions	2s
test (3.0)	34s
test (3.1)	35s
test (3.2)	35s
test (3.3)	41s
test (3.4)	35s
test (debug)	52s
test (head)	33s
	4m 27s

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