https://git.ruby-lang.org/ruby.git/commit/?id=25100c4697

From 25100c469758dd3676ec608ed27fd89248980666 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 10 Oct 2019 08:53:46 +0900
Subject: lhs of pattern matching expression of should have a value


diff --git a/parse.y b/parse.y
index cddeb3c..72470af 100644
--- a/parse.y
+++ b/parse.y
@@ -1540,6 +1540,7 @@ expr		: command_call https://github.com/ruby/ruby/blob/trunk/parse.y#L1540
 		    }
 		| arg keyword_in
 		    {
+			value_expr($1);
 			SET_LEX_STATE(EXPR_BEG|EXPR_LABEL);
 			p->command_start = FALSE;
 			$<num>$ = p->in_kwarg;
-- 
cgit v0.10.2


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