From 5becfc494751f32eb5c2be375cd9ce5f02165bbd Mon Sep 17 00:00:00 2001
From: Mathew Dixon <matt@7halo.in>
Date: Tue, 11 Jul 2017 19:31:59 +1000
Subject: [PATCH] Added ability to handle compile errors in the template haml
 and documented accordingly.

---
 README.markdown | 2 ++
 lib/haml.js     | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.markdown b/README.markdown
index f16c951..02c3fd1 100644
--- a/README.markdown
+++ b/README.markdown
@@ -98,6 +98,8 @@ Notice how congruent static strings are merged into a single string literal when
 
 Context is the value of `this` in the template, and locals is a hash of local variables.
 
+If `context._err` is a function it will be called with `context._err(error, formatted_error_string)` instead of returning the default formatted error string.
+
 ### Haml.render(text, options) -> html text
 
 This is a convenience function that compiles and executes to html in one shot.  Most casual users will want to use this function exclusively.
diff --git a/lib/haml.js b/lib/haml.js
index b726905..afd65f1 100755
--- a/lib/haml.js
+++ b/lib/haml.js
@@ -652,7 +652,9 @@ var Haml;
           eval("_$output =" + js );
           return _$output; //set in eval
         } catch (e) {
-          return "\n<pre class='error'>" + html_escape(e + "\n" + e.stack) + "</pre>\n";
+	  var formatted = "\n<pre class='error'>" + html_escape(e + "\n" + e.stack) + "</pre>\n";
+	  if (typeof self._err === 'function') return self._err(e,formatted);
+          return formatted;
         }
 
       }