From 66b2d18243d055bcbc6c3f7708960575d02db09c Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 16 Jun 2014 10:05:09 -0400
Subject: [PATCH] Don't parse 'var == expr' as an assignment

---
 nix-repl.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nix-repl.cc b/nix-repl.cc
index 8049008d1..ea188a1c7 100644
--- a/nix-repl.cc
+++ b/nix-repl.cc
@@ -350,6 +350,8 @@ bool NixRepl::processLine(string line)
         size_t p = line.find('=');
         string name;
         if (p != string::npos &&
+            p < line.size() &&
+            line[p + 1] != '=' &&
             isVarName(name = removeWhitespace(string(line, 0, p))))
         {
             Expr * e = parseString(string(line, p + 1));