ruby.git/test/zlib, branch v4.0.2

Merge zlib-3.2.3

2026-03-09T15:19:27+00:00

[ruby/zlib] Load the same loaded zlib

2025-10-08T14:53:00+00:00

Zlib is used by also rubygems, the built extension cannot be loaded
after the default gem is loaded.

https://github.com/ruby/zlib/commit/02a29dc7ea

[ruby/zlib] Don't call `rb_str_set_len` while released the GVL.

2024-11-20T21:02:16+00:00

(https://github.com/ruby/zlib/pull/88)

* Only release the GVL where necessary.

- Several string manipulation methods were invoked while the GVL was
  released. This is unsafe.
- The mutex protecting multi-threaded access was not covering buffer state
  manipulation, leading to data corruption and out-of-bounds writes.
- Using `rb_str_locktmp` prevents changes to buffer while it's in use.

[Bug #20863]

https://github.com/ruby/zlib/commit/e445cf3c80

[ruby/zlib] Avoid allocating intermediary strings when read/readpartial are passed an outbuf

2024-05-14T21:44:34+00:00

This accounts for a significant number of string allocations when reading rubygems, but we can avoid that in many places by only copying into the outbuf when present

https://github.com/ruby/zlib/commit/d25ef406c1

[ruby/zlib] Clear temporary directory

2024-04-20T10:53:41+00:00

https://github.com/ruby/zlib/commit/1bed54dcf7

[ruby/zlib] In Zlib::GzipReader#eof? check if we're actually at eof

2024-02-22T06:42:06+00:00

Only consider it eof if we read ahead and something fills the buf.
If not, we may only have empty blocks and the footer.

Fixes https://github.com/ruby/zlib/pull/56

https://github.com/ruby/zlib/commit/437bea8003

[ruby/zlib] Revert "Workaround: Fix test failures on Ubuntu jammy s390x."

2023-09-29T16:14:29+00:00

This reverts commit https://github.com/ruby/zlib/commit/9f3b9c470c05 because we will
fix the issue on alternative way.

https://github.com/ruby/zlib/commit/3dfe3f9110

[ruby/zlib] Workaround: Fix test failures on Ubuntu jammy s390x.

2023-09-25T17:59:04+00:00

This commit fixes the test failures on the zlib in Ubuntu jammy s390x.

According to the  -
`zlib_1.2.11.dfsg-2ubuntu9.2.debian.tar.xz`,
the zlib deb package is applying the patch 410.patch (madler/zlib#410), and
configured by `./configure --dfltcc` on Ubuntu jammy s390x. The `--dfltcc`
is to enable the deflate algorithm in hardware.

It produces a different (but still valid) compressed byte stream, and causes
the test failures in ruby/zlib. As a workaround, set the environment variable
`DFLTCC=0` disabling the implementation in zlib on s390x to the failing tests.

Note we need to test in a child Ruby process with `assert_separately` to test
on the `DFLTCC=0` set by the parent Ruby process.

https://github.com/ruby/zlib/commit/9f3b9c470c

[ruby/zlib] Add truffleruby-head in CI

2023-09-22T07:29:22+00:00

* The latest release does not have this fix:
  https://github.com/oracle/truffleruby/commit/c77f8bb35db084c99d1f5b14748267866004222e

https://github.com/ruby/zlib/commit/8abc80b994

[ruby/zlib] Zlib.gunzip should not fail with utf-8 strings

2023-08-10T20:12:21+00:00

(https://github.com/ruby/zlib/pull/55)

zstream_discard_input was encoding and character-aware when given input is user-provided, so this discards `len` chars instead of `len` bytes.

Also Zlib.gunzip explains in its rdoc that it is equivalent with the following code, but this doesn't fail for UTF-8 String.

```ruby
string = %w[1f8b0800c28000000003cb48cdc9c9070086a6103605000000].pack("H*").force_encoding('UTF-8')
sio = StringIO.new(string)
p gz.read #=> "hello"
gz&.close
p Zlib.gunzip(string) #=> Zlib::DataError
```

Reported and discovered by eagletmt at https://twitter.com/eagletmt/status/1689692467929694209

https://github.com/ruby/zlib/commit/c5e58bc62a