[ruby-core:120431] [Ruby master Bug#20988] String literal that includes `\C-` `\M-` with `\111` wrongly parsed

27 Dec 2024


      Issue #20988 has been reported by tompng (tomoya ishida).

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Bug #20988: String literal that includes `\C-` `\M-` with `\111` wrongly parsed
https://bugs.ruby-lang.org/issues/20988

* Author: tompng (tomoya ishida)
* Status: Open
* ruby -v: ruby 3.5.0dev (2024-12-27T07:27:30Z master adbbc9109e) +YJIT +MN +PRISM [arm64-darwin22]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
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Prism and parse.y parses this string literal differently.
~~~
$ ./ruby -e 'p "\C-\111 \M-\111 \M-\C-\111"'
"I I I"
~~~

~~~
$ ./ruby --parser=parse.y -e 'p "\C-\111 \M-\111 \M-\C-\111"'
"\t \xC9 \x89"
~~~


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