From 5435a9a4a85d8829b1e380dbcfc4fb8768151af2 Mon Sep 17 00:00:00 2001
From: Erik Demaine <edemaine@mit.edu>
Date: Sun, 5 Jan 2025 12:25:30 -0500
Subject: [PATCH] Fix pipe into certain `new` expressions

Fixes #1674
---
 source/parser/pipe.civet | 3 +--
 test/pipe.civet          | 8 ++++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/source/parser/pipe.civet b/source/parser/pipe.civet
index c06b15ed..8f827cf8 100644
--- a/source/parser/pipe.civet
+++ b/source/parser/pipe.civet
@@ -73,9 +73,8 @@ function constructInvocation(fn: ExprWithComments, arg: ASTNode!)
   if lhs.type is "NewExpression"
     { expression } .= lhs
     expression = {
-      ...expression
       type: "CallExpression"
-      children: [ ...expression.children, call ]
+      children: [ expression, call ]
     }
     {
       ...lhs
diff --git a/test/pipe.civet b/test/pipe.civet
index 33d86dda..530151ff 100644
--- a/test/pipe.civet
+++ b/test/pipe.civet
@@ -330,6 +330,14 @@ describe "pipe", ->
     new Foo(x)(x)
   """
 
+  throws """
+    pipe to invalid new
+    ---
+    x |> new .
+    ---
+    ParseErrors: unknown:1:10 Partial placeholder . outside of call expression
+  """
+
   testCase """
     pipe from new
     ---