From 88c42a2ba0f0baa9fd20bb7abddc2ad89b66a508 Mon Sep 17 00:00:00 2001
From: Peter Stephenson <p.w.stephenson@ntlworld.com>
Date: Sun, 30 Oct 2016 17:12:04 +0000
Subject: 39777: $() is a valid empty command substitution

---
 ChangeLog             |  5 +++++
 Src/parse.c           |  2 +-
 Test/D08cmdsubst.ztst | 14 ++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index c453aee84..e08cafd30 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-10-30  Peter Stephenson  <p.w.stephenson@ntlworld.com>
+
+	* 39777: Src/parse.c, Test/D08cmdsubst.ztst: $() is a valid
+	empty command substitution.
+
 2016-10-29  Barton E. Schaefer  <schaefer@zsh.org>
 
 	* 39758: Src/builtin.c, Src/params.c: revise 39704 to output
diff --git a/Src/parse.c b/Src/parse.c
index 24b8cd97f..50a0d5f9f 100644
--- a/Src/parse.c
+++ b/Src/parse.c
@@ -594,7 +594,7 @@ par_event(int endtok)
     if (tok == ENDINPUT)
 	return 0;
     if (tok == endtok)
-	return 0;
+	return 1;
 
     p = ecadd(0);
 
diff --git a/Test/D08cmdsubst.ztst b/Test/D08cmdsubst.ztst
index 89e725966..362537349 100644
--- a/Test/D08cmdsubst.ztst
+++ b/Test/D08cmdsubst.ztst
@@ -153,3 +153,17 @@
   eval 'foo echo this just works, OK\?)'
 0:backtracking within command string parsing with alias still pending
 >this just works, OK?
+
+  (
+    set errexit
+    show_nargs() { print $#; }
+    print a $() b
+    print c "$()" d
+  )
+0:Empty $() is a valid empty substitution.
+>a b
+>c  d
+
+  empty=$() && print "'$empty'"
+0:Empty $() is a valid assignment
+>''
-- 
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