Bug #20161: Memory leak in regexp grapheme clusters - Ruby - Ruby Issue Tracking System

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#1

Fix memory leak in regexp grapheme clusters

The cc->mbuf gets overwritten, so we need to free it to not leak memory.

For example:

str = "hello world".encode(Encoding::UTF_32LE)

10.times do
  1_000.times do
    str.grapheme_clusters
  end

  puts `ps -o rss= -p #{$$}`
end

Before:

After:

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#2 [ruby-core:116287]

Backport changed from 3.0: UNKNOWN, 3.1: REQUIRED, 3.2: REQUIRED, 3.3: REQUIRED to 3.0: UNKNOWN, 3.1: REQUIRED, 3.2: DONE, 3.3: REQUIRED

ruby_3_2 a26b41bf7a2db69b0889ed599f568a4ba2529eba merged revision(s) 37ed86fd3c798e298fad9db6e7df1f3f45e1e03b.

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#3 [ruby-core:117164]

Backport changed from 3.0: UNKNOWN, 3.1: REQUIRED, 3.2: DONE, 3.3: REQUIRED to 3.0: UNKNOWN, 3.1: REQUIRED, 3.2: DONE, 3.3: DONE

ruby_3_3 577f9c7a8334bb33512f01e7db95f6fb15e280b2 merged revision(s) 37ed86fd3c798e298fad9db6e7df1f3f45e1e03b.

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