From 584ed916abcc1e7b51382128c0218d025a710d5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krzysztof=20Zab=C5=82ocki?= <krzysztof.zablocki@pixle.pl>
Date: Wed, 17 May 2017 22:03:43 +0200
Subject: [PATCH] fix(lexer): Prevent deadlock with unclosed tag

---
 Sources/Lexer.swift                |  1 +
 Tests/StencilTests/LexerSpec.swift | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Sources/Lexer.swift b/Sources/Lexer.swift
index e7fcd7c..8e3fa33 100644
--- a/Sources/Lexer.swift
+++ b/Sources/Lexer.swift
@@ -90,6 +90,7 @@ class Scanner {
       index = content.index(after: index)
     }
 
+    content = ""
     return ""
   }
 
diff --git a/Tests/StencilTests/LexerSpec.swift b/Tests/StencilTests/LexerSpec.swift
index 8cb83c0..66667ba 100644
--- a/Tests/StencilTests/LexerSpec.swift
+++ b/Tests/StencilTests/LexerSpec.swift
@@ -16,7 +16,7 @@ func testLexer() {
       let lexer = Lexer(templateString: "{# Comment #}")
       let tokens = lexer.tokenize()
 
-      try expect(tokens.count) == (1)
+      try expect(tokens.count) == 1
       try expect(tokens.first) == .comment(value: "Comment")
     }
 
@@ -28,6 +28,14 @@ func testLexer() {
       try expect(tokens.first) == .variable(value: "Variable")
     }
 
+    $0.it("can tokenize unclosed tag by ignoring it") {
+      let lexer = Lexer(templateString: "{{ thing")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == 1
+      try expect(tokens.first) == .text(value: "")
+    }
+
     $0.it("can tokenize a mixture of content") {
       let lexer = Lexer(templateString: "My name is {{ name }}.")
       let tokens = lexer.tokenize()