File dash-remove-backslash-before-in-double-quotes-in-variable.patch of Package dash

From 1ed728ca0ea91cac348e1baf070399df5d575115 Mon Sep 17 00:00:00 2001
From: Jilles Tjoelker <jilles@stack.nl>
Date: Sun, 21 Nov 2010 14:42:22 +0100
Subject: [PARSER] Remove backslash before } in double-quotes in variable

The backslash prevents the closing brace from terminating the
substitution, therefore it should be removed.

FreeBSD sh test expansion/plus-minus2.0 starts working, no other tests
are affected.

Example:
  printf "%s\n" ${$+\}} ${$+"\}"} "${$+\}}"
should print } three times, without backslashes.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 src/parser.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/parser.c b/src/parser.c
index 6de27629..4fa8c6d4 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -926,6 +926,9 @@ readtoken1(int firstc, char const *syntax, char *eofmark, int striptabs)
 						c != '$' && (
 							c != '"' ||
 							eofmark != NULL
+						) && (
+							c != '}' ||
+							varnest == 0
 						)
 					) {
 						USTPUTC('\\', out);
-- 
1.7.6