[ruby-core:107353] [Ruby master Bug#18443] IO read/write/wait hook bug fixes.

Issue #18443 has been updated by nagachika (Tomoyuki Chikanaga).


I have confirmed the PR https://github.com/ruby/ruby/pull/5473 contains the two whole backports and a partial backport from master branch.

I think e4cd319f3d6560b76dbc1c7e89aa4d790a2d1e43 should be backported. @naruse can I backport it?

The others are changesets for default gems stdlibs (irb and io-console).
I prefer to sync released version from upstream for default gems.

io-console-0.5.11.gem was released with the corresponding commits. I think these changesets are okey to backport. f27eb8148f5a72bbacfebfecc7de9305471bb5c9, d5836db1b398a7936b0461b3011db66f6cc8c490, d75f7078c831d45ab5ba2fae4fbb308d01a21e46.

irb was not released yet with the changeset https://github.com/ruby/irb/commit/1c03bd33737e9c69ffa34a86618d69a543795e75. @aycabta, do you have any plan to release new version of irb?

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Bug #18443: IO read/write/wait hook bug fixes.
https://bugs.ruby-lang.org/issues/18443#change-96252

* Author: ioquatix (Samuel Williams)
* Status: Closed
* Priority: Normal
* Backport: 2.6: DONTNEED, 2.7: DONTNEED, 3.0: DONTNEED, 3.1: REQUIRED
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After testing Ruby 3.1.0 extensively, I found some obscure bugs which should be fixed. This should be back ported to 3.1.1 ASAP.

- `console.c` incorrect `rb_io_wait` argument.
- `rb_read_internal` incorrect logic when handling partial non-blocking reads in `io.c`.
- Prefer `wait_readable` rather than `IO.select` in irb implementation.

Please see https://github.com/ruby/ruby/pull/5353 for details.



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