From 61829eec657e8271f05a74f2067b4203ba0a51a2 Mon Sep 17 00:00:00 2001
From: Kevin Newton <kddnewton@gmail.com>
Date: Wed, 8 May 2024 12:38:42 -0400
Subject: [ruby/prism] Ensure keyword parameters do not end in ! or ?

https://github.com/ruby/prism/commit/57d86a8545
---
 prism/prism.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/prism/prism.c b/prism/prism.c
index 97fa30e4bd..6ae32825eb 100644
--- a/prism/prism.c
+++ b/prism/prism.c
@@ -14326,6 +14326,10 @@ parse_parameters(
                 pm_token_t local = name;
                 local.end -= 1;
 
+                if (local.end[-1] == '!' || local.end[-1] == '?') {
+                    PM_PARSER_ERR_TOKEN_FORMAT_CONTENT(parser, local, PM_ERR_INVALID_LOCAL_VARIABLE_WRITE);
+                }
+
                 bool repeated = pm_parser_parameter_name_check(parser, &local);
                 pm_parser_local_add_token(parser, &local, 1);
 
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