Ruby Issue Tracking System

Today

02:47 PM Ruby Revision 390d77ba (git): Fix memory leak in String#encode when StringValue raises

The following script leaks memory:
10.times do
100_000.times do
"\ufffd".encode(Encoding::US_ASCII, fallback: proc { Object.new })
rescue
end
puts `ps -o rss= -p #{$$}`
end
Before:
450244
... peterzhu2118 (Peter Zhu)

10/31/2025

12:13 AM Ruby Revision a4c33615 (git): [ruby/mmtk] Bump mmtk-core

https://github.com/ruby/mmtk/commit/9876d8f0a1 peterzhu2118 (Peter Zhu)

10/30/2025

12:18 AM Ruby Revision b8c82a99 (git): Fix memory leak in String#encode when fallback too big

The following script leaks memory:
10.times do
100_000.times do
"\ufffd".encode(Encoding::US_ASCII, fallback: proc { "\uffee" })
rescue
end
puts `ps -o rss= -p #{$$}`
end
Before:
451196
... peterzhu2118 (Peter Zhu)

10/28/2025

11:40 PM Ruby Revision 4925bec6 (git): Fix TestString#test_encode_fallback_raise_memory_leak

The method and aref cases need to accept a parameter. peterzhu2118 (Peter Zhu)

11:40 PM Ruby Revision 9f4a76ff (git): Add a custom error class to TestString#test_encode_fallback_raise_memory_leak

This prevents a generic RuntimeError from being raised so we can ensure
that the correct error is being rescued. peterzhu2118 (Peter Zhu)

10/26/2025

07:27 PM Ruby Revision b66fbd59 (git): Make rb_vm_ccs_invalidate_and_free static

peterzhu2118 (Peter Zhu)

10/24/2025

10:34 PM Ruby Revision cb302881 (git): Fix memory leak of transcoding when fallback raises

When the fallback function in transcode_loop raises, it will leak the memory
in rb_econv_t. The following script reproduces the leak:
10.times do
100_000.times do
"\ufffd".encode(Encoding::US_ASCII, fallback: proc { ra... peterzhu2118 (Peter Zhu)

10/23/2025

04:54 PM Ruby Revision b3fb91f4 (git): Make Namespace::Root TypedData inherit from Namespace::Entry

The two types of TypedData objects should be treated the same except for
the free function. Since Namespace::Root did not inherit from Namespace::Entry,
all the TypedData_Get_Struct calls for Namespace::Root would raise
"wrong argument t... peterzhu2118 (Peter Zhu)

10/22/2025

11:36 PM Ruby Revision da4bd3b3 (git): Fix memory leak when RUBYOPT is invalid

When RUBYOPT is invalid, it raises an error which causes moreswitches
to leak memory. It can be seen when building with LSAN enabled:
$ RUBY_FREE_AT_EXIT=1 RUBYOPT=f ruby
ruby: invalid option -f (-h will show valid options) (Ru... peterzhu2118 (Peter Zhu)

12:21 AM Ruby Revision f46ebed2 (git): Fix memory leak of darray in loaded_features_index

peterzhu2118 (Peter Zhu)