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k0kubun (Takashi Kokubun)

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Assigned issues 6 114 120
Reported issues 1 78 79

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Ruby Committer, Release Manager 05/15/2017

Activity

Today

04:05 PM Ruby Misc #22272: Propose Kevin Menard (@nirvdrum) as a core committer
+1. He's made significant contributions to ZJIT. Having Kevin as a committer would help the ZJIT development a lot. k0kubun (Takashi Kokubun)
03:14 PM Ruby Bug #22268 (Closed): Backport resolv security fixes (CVE-2026-80212, CVE-2026-80213)
k0kubun (Takashi Kokubun)

08/26/2026

04:25 PM Ruby Revision c4e235f4 (git): ZJIT: Pass overflow cfunc call args on the stack (#18428)
k0kubun (Takashi Kokubun)

08/21/2026

10:12 PM Ruby Revision 9f7d597b (git): ZJIT: Split OperandTooLarge out of TooManyArgsForLir (#18398)
k0kubun (Takashi Kokubun)
10:12 PM Ruby Revision 44fc9c03 (git): ZJIT: Let ruby-bench CI show Rust backtraces (#18412)
k0kubun (Takashi Kokubun)
09:28 PM Ruby Revision 39281110 (git): Revert "Stop retrying tests in `make test-all` command by default"
This reverts commit 48b6c60969e544d0b50e92bab10711d34fed9c27.
The effort is meant to be done in master branch where a lot more commits
are pushed every day. It doesn't seem like it would pay off for stable
branches.
k0kubun (Takashi Kokubun)

08/19/2026

04:52 PM Ruby Revision 0293d6d6 (git): ZJIT: Pass JIT-to-JIT call args on the stack
k0kubun (Takashi Kokubun)
04:52 PM Ruby Revision 64b9d2f8 (git): ZJIT: Allow STP with an identical register pair
Storing the same register twice with STP is well-defined, unlike LDP,
whose destination registers must be distinct. CPushPair hits this when
two adjacent stack-passed arguments are the same zero immediate (both
lowered to xzr, e.g. two l...
k0kubun (Takashi Kokubun)
04:52 PM Ruby Revision 4a6b7fa6 (git): ZJIT: Rename stack-args tests after ABI registers
k0kubun (Takashi Kokubun)
04:52 PM Ruby Revision e1887322 (git): ZJIT: Extract c_arg_location() for C-ABI argument locations
k0kubun (Takashi Kokubun)

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