From 334c261cc9ee125c4c4bfc65dec2e571af8944a2 Mon Sep 17 00:00:00 2001
From: Earlopain <14981592+Earlopain@users.noreply.github.com>
Date: Sun, 30 Mar 2025 13:28:36 +0200
Subject: [ruby/prism] Fix parser translator when splatting in pattern matching
 pin

Because it ends up treating it as a local variable, and `a.x`
is not a valid local variable name.

I'm not big on pattern matching, but conceptually it makes sense to me
to treat anything inside ^() to not be
pattern matching syntax?

https://github.com/ruby/prism/commit/80dbd85c45
---
 lib/prism/translation/parser/compiler.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/prism/translation/parser')

diff --git a/lib/prism/translation/parser/compiler.rb b/lib/prism/translation/parser/compiler.rb
index acf4e77ee4..1beccc30a1 100644
--- a/lib/prism/translation/parser/compiler.rb
+++ b/lib/prism/translation/parser/compiler.rb
@@ -1481,7 +1481,8 @@ module Prism
         # foo => ^(bar)
         #        ^^^^^^
         def visit_pinned_expression_node(node)
-          expression = builder.begin(token(node.lparen_loc), visit(node.expression), token(node.rparen_loc))
+          parts = node.expression.accept(copy_compiler(in_pattern: false)) # Don't treat * and similar as match_rest
+          expression = builder.begin(token(node.lparen_loc), parts, token(node.rparen_loc))
           builder.pin(token(node.operator_loc), expression)
         end
 
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