From 807d899f3b6139a61b644420d3f74b21bb0fb272 Mon Sep 17 00:00:00 2001
From: Martin Schwenke <martin@meltin.net>
Date: Thu, 20 Jul 2017 09:20:37 +1000
Subject: [PATCH] Fix incorrect detection of bash-style substring expansion

Substring expansion detection only considers ':' as a separator..  It
needs to avoid triggering for ":-", ":=", ":+" and ":?", since they
mean other things.

This is a regression introduced by commit
a90b6d14b3de0f21db462afbc925444687feb2ca

Signed-off-by: Martin Schwenke <martin@meltin.net>
---
 ShellCheck/AnalyzerLib.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ShellCheck/AnalyzerLib.hs b/ShellCheck/AnalyzerLib.hs
index a119d9b..bb8df63 100644
--- a/ShellCheck/AnalyzerLib.hs
+++ b/ShellCheck/AnalyzerLib.hs
@@ -623,7 +623,7 @@ getOffsetReferences mods = fromMaybe [] $ do
     offsets <- match !!! 0
     return $ matchAllStrings variableNameRegex offsets
   where
-    re = mkRegex "^ *:(.*)"
+    re = mkRegex "^ *:([^-=?+].*)"
 
 getReferencedVariables parents t =
     case t of