From 83da985bf69696362d4f86caa9f5ec74faa58c5d Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Wed, 3 May 2017 08:13:07 -0700
Subject: [PATCH] Check Ruby syntax on `haml -c`

Close #880
---
 lib/haml/exec.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/haml/exec.rb b/lib/haml/exec.rb
index 82657f6896..de9fca38e2 100644
--- a/lib/haml/exec.rb
+++ b/lib/haml/exec.rb
@@ -301,6 +301,11 @@ def process_result
           engine = ::Haml::Engine.new(template, @options[:for_engine])
 
           if @options[:check_syntax]
+            error = validate_ruby(engine.precompiled)
+            if error
+              puts error.message.split("\n").first
+              exit 1
+            end
             puts "Syntax OK"
             return
           end
@@ -333,7 +338,7 @@ def process_result
 
       def validate_ruby(code)
         begin
-          eval("BEGIN {return nil}; #{code}")
+          eval("BEGIN {return nil}; #{code}", binding, @options[:filename])
         rescue ::SyntaxError # Not to be confused with Haml::SyntaxError
           $!
         end