From 5b00be4954a4a9d679a1db29862a8eff1220187a Mon Sep 17 00:00:00 2001
From: Vinicius Stock <vinicius.stock@shopify.com>
Date: Wed, 20 Apr 2022 15:08:42 -0400
Subject: [PATCH] Make missing kwargs `nil` instead of `false`

---
 lib/syntax_tree/parser.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/syntax_tree/parser.rb b/lib/syntax_tree/parser.rb
index 696a944c..f167aa83 100644
--- a/lib/syntax_tree/parser.rb
+++ b/lib/syntax_tree/parser.rb
@@ -2079,12 +2079,16 @@ def on_params(
       keyword_rest,
       block
     )
+      # This is to make it so that required keyword arguments
+      # have a `nil` for the value instead of a `false`.
+      keywords&.map! { |(key, value)| [key, value || nil] }
+
       parts = [
         *requireds,
         *optionals&.flatten(1),
         rest,
         *posts,
-        *keywords&.flat_map { |(key, value)| [key, value || nil] },
+        *keywords&.flatten(1),
         (keyword_rest if keyword_rest != :nil),
         (block if block != :&)
       ].compact