Peter Zhu da4bd3b3df 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) (RuntimeError)

    Direct leak of 16 byte(s) in 1 object(s) allocated from:
        #0 0x618cef8efa23 in malloc (miniruby+0x64a23)
        #1 0x618cefa0e8d8 in rb_gc_impl_malloc gc/default/default.c:8182:5
        #2 0x618cef9f7f01 in ruby_xmalloc2_body gc.c:5182:12
        #3 0x618cef9f7eac in ruby_xmalloc2 gc.c:5176:34
        #4 0x618cefb547b2 in moreswitches ruby.c:919:18
        #5 0x618cefb526fe in process_options ruby.c:2350:9
        #6 0x618cefb524ac in ruby_process_options ruby.c:3202:12
        #7 0x618cef9dc11f in ruby_options eval.c:119:16
        #8 0x618cef8f2fb5 in rb_main main.c:42:26
        #9 0x618cef8f2f59 in main main.c:62:12
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What is Ruby?

Ruby is an interpreted object-oriented programming language often used for web development. It also offers many scripting features to process plain text and serialized files, or manage system tasks. It is simple, straightforward, and extensible.

Features of Ruby

  • Simple Syntax
  • Normal Object-oriented Features (e.g. class, method calls)
  • Advanced Object-oriented Features (e.g. mix-in, singleton-method)
  • Operator Overloading
  • Exception Handling
  • Iterators and Closures
  • Garbage Collection
  • Dynamic Loading of Object Files (on some architectures)
  • Highly Portable (works on many Unix-like/POSIX compatible platforms as well as Windows, macOS, etc.) cf. https://docs.ruby-lang.org/en/master/maintainers_md.html#label-Platform+Maintainers

How to get Ruby

For a complete list of ways to install Ruby, including using third-party tools like rvm, see:

https://www.ruby-lang.org/en/downloads/

You can download release packages and the snapshot of the repository. If you want to download whole versions of Ruby, please visit https://www.ruby-lang.org/en/downloads/releases/.

Download with Git

The mirror of the Ruby source tree can be checked out with the following command:

$ git clone https://github.com/ruby/ruby.git

There are some other branches under development. Try the following command to see the list of branches:

$ git ls-remote https://github.com/ruby/ruby.git

You may also want to use https://git.ruby-lang.org/ruby.git (actual master of Ruby source) if you are a committer.

How to build

See Building Ruby

Ruby home page

https://www.ruby-lang.org/

Documentation

Mailing list

There is a mailing list to discuss Ruby. To subscribe to this list, please send the following phrase:

join

in the mail subject (not body) to the address ruby-talk-request@ml.ruby-lang.org.

Copying

See the file COPYING.

Feedback

Questions about the Ruby language can be asked on the Ruby-Talk mailing list or on websites like https://stackoverflow.com.

Bugs should be reported at https://bugs.ruby-lang.org. Read "Reporting Issues" for more information.

Contributing

See "Contributing to Ruby", which includes setup and build instructions.

The Author

Ruby was originally designed and developed by Yukihiro Matsumoto (Matz) in 1995.

matz@ruby-lang.org

Description
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