From: "eightbitraptor (Matthew Valentine-House) via ruby-core" <ruby-core@...>
Date: 2023-12-19T13:52:12+00:00
Subject: [ruby-core:115793] [Ruby master Bug#20073] Method lookup incorrect with `--parser=prism`

Issue #20073 has been reported by eightbitraptor (Matthew Valentine-House).



----------------------------------------

Bug #20073: Method lookup incorrect with `--parser=prism`

https://bugs.ruby-lang.org/issues/20073



* Author: eightbitraptor (Matthew Valentine-House)

* Status: Open

* Priority: Normal

* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

----------------------------------------

The following code works with both CRuby's compiler and Prism when evaluated using `RubyVM::InstructionSequence`



```

~/git/ruby master ���

��� ./miniruby -d -e'p RubyVM::InstructionSequence.compile_prism("tap { }").eval'

main



~/git/ruby master ���

��� ./miniruby -d -e'p RubyVM::InstructionSequence.compile("tap { }").eval'

main

```



However when using the command line `--parser=prism` flag it results in a `NoMethodError` attempting to find `tap`, whereas CRuby's parser does not.



```

~/git/ruby master ���

��� ./miniruby -d -e'p tap { }'

main



~/git/ruby master ���

��� ./miniruby --parser=prism -d -e'p tap { }'

./miniruby: warning: The compiler based on the Prism parser is currently experimental and compatibility with the compiler based on parse.y is not yet complete. Please report any issues you find on the `ruby/prism` issue tracker.

Exception `NoMethodError' at <compiled> - undefined method `tap' for main

<compiled>:in `<compiled>': undefined method `tap' for main (NoMethodError)

```



This appears to be because the toplevel binding context is not being prepended to the linked list of instruction sequences when `--parser=prism` is passed.











-- 

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

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