From 6ecfa096d57be19346e9c61c0061f77ae39c1ddb Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Wed, 23 Sep 2020 17:18:57 +0200
Subject: [PATCH] Fix tainted state for custom matters

Closes GH-1.
---
 lib/syntax.js |  3 ++-
 test.js       | 18 +++++++++++++-----
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lib/syntax.js b/lib/syntax.js
index 783f449..a6c541f 100644
--- a/lib/syntax.js
+++ b/lib/syntax.js
@@ -24,7 +24,7 @@ function parse(matter) {
   var fenceType = name + 'Fence'
   var sequenceType = fenceType + 'Sequence'
   var fenceConstruct = {tokenize: tokenizeFence, partial: true}
-  var buffer = fence(matter, 'open')
+  var buffer
 
   return {tokenize: tokenizeFrontmatter, concrete: true}
 
@@ -41,6 +41,7 @@ function parse(matter) {
       }
 
       effects.enter(name)
+      buffer = fence(matter, 'open')
       return effects.attempt(fenceConstruct, afterOpeningFence, nok)(code)
     }
 
diff --git a/test.js b/test.js
index 9bae949..a86f629 100644
--- a/test.js
+++ b/test.js
@@ -188,22 +188,30 @@ test('markdown -> html (micromark)', function (t) {
     'should support blank lines in yaml'
   )
 
+  var customOptions = {
+    extensions: [syntax(custom)],
+    htmlExtensions: [html(custom)]
+  }
+
   t.deepEqual(
-    micromark('<<<\na\n\nb\n>>>', {
-      extensions: [syntax(custom)],
-      htmlExtensions: [html(custom)]
-    }),
+    micromark('<<<\na\n\nb\n>>>', customOptions),
     '',
     'should support a custom matter (1)'
   )
 
+  t.deepEqual(
+    micromark('<<<\na\n\nb\n>>>', customOptions),
+    '',
+    'should support a custom matter (2)'
+  )
+
   t.deepEqual(
     micromark('{\na\n\nb\n}', {
       extensions: [syntax(json)],
       htmlExtensions: [html(json)]
     }),
     '',
-    'should support a custom matter (2)'
+    'should support a custom matter (3)'
   )
 
   t.deepEqual(