Backport 4.0: Add pushtoarray insn to fix segfault with forwarding + splat#15870
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k0kubun merged 1 commit intoruby:ruby_4_0from Jan 14, 2026
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Example insns diff for `def x = [3]; def a(...) = b(*x, 2, 3, ...)`
== disasm: #<ISeq:a@-e:1 (1,13)-(1,42)>
local table (size: 1, argc: 0 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1])
[ 1] "..."@0
0000 putself ( 1)[Ca]
0000 putself
0000 opt_send_without_block <calldata!mid:x, argc:0, FCALL|VCALL|ARGS_SIMPLE>
0000 splatarray true
0000 putobject 2
0000 putobject 3
+0000 pushtoarray 2
0000 getlocal_WC_0 "..."@0
0000 sendforward <calldata!mid:b, argc:1, ARGS_SPLAT|ARGS_SPLAT_MUT|FCALL|FORWARDING>, nil
0000 leave [Re]
This matches the insns produced by parse.y
tekknolagi
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Jan 14, 2026
k0kubun
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Jan 14, 2026
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k0kubun
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Thanks for the backport PRs 🙏
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Backporting #15855
Example insns diff for
def x = [3]; def a(...) = b(*x, 2, 3, ...)This matches the insns produced by parse.y