[pull] master from ruby:master - #1324
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Share a generated source archive across compiler jobs to avoid repeating checkout and `make up` on every runner.
Keep the longest compiler jobs below 30 minutes after preparing sources once.
Split compiler configurations into smaller matrix shards so faster runners can pick up pending work.
… remaining input A crafted 4-byte length makes read_array and its siblings allocate the Array.new backing store before reading a single element, so an 8-byte payload can request gigabytes of memory (HackerOne 3877678, triaged as hardening). Since every element consumes at least one byte, a count larger than the remaining input bytes can never be valid. Raise the new LengthTooLongError instead of allocating, and add the negative length check that read_hash was missing. ruby/rubygems@4c16744929 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
A custom IO whose `read` returns more bytes than requested makes the leftover copy in `r_bytes1_buffered` write past the end of `arg->buf`. 7455eb4 fixed the same overread only for `r_byte1_buffered`.
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