From: "tomstuart (Tom Stuart)" <noreply@...>
Date: 2022-12-02T12:44:03+00:00
Subject: [ruby-core:111155] [Ruby master Bug#19173] syntax_suggest segfaults on syntax error when refinement activated

Issue #19173 has been reported by tomstuart (Tom Stuart).



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

Bug #19173: syntax_suggest segfaults on syntax error when refinement activated

https://bugs.ruby-lang.org/issues/19173



* Author: tomstuart (Tom Stuart)

* Status: Open

* Priority: Normal

* ruby -v: ruby 3.2.0dev (2022-12-02T10:47:18Z master 11871e49c4) [arm64-darwin21]

* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN

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

While reporting certain syntax errors (e.g. ���Invalid yield���, ���Invalid redo���), `syntax_suggest` segfaults when a refinement is activated:



```

% echo 'yield' > test.rb; ruby test.rb

test.rb:1: Invalid yield

test.rb: compile error (SyntaxError)



% echo 'using Module.new; yield' > test.rb; ruby test.rb

test.rb:1: Invalid yield

/Users/tom/.rubies/ruby-master/lib/ruby/3.2.0+3/fileutils.rb:2646: [BUG] Segmentation fault at 0x0000000000000008

[���]

-- Ruby level backtrace information ----------------------------------------

/Users/tom/.rubies/ruby-master/lib/ruby/3.2.0+3/syntax_suggest/core_ext.rb:25:in `detailed_message'

```



There���s no problem if `syntax_suggest` is disabled:



```

% echo 'using Module.new; yield' > test.rb; ruby --disable-syntax_suggest test.rb

test.rb:1: Invalid yield

test.rb: compile error (SyntaxError)

```



This bug exists on both `3.2.0-preview3` and `master`, and I���ve verified it on x86_64 as well as my arm64 machine. A crash report log is attached.



---Files--------------------------------

ruby-2022-12-02-122013.ips (16.4 KB)





-- 

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