commit 0a9c402af282655cc7bbe31553fa12c36d5b3cc4
author Michael Thomsen <mit-mit@users.noreply.github.com> Thu Nov 02 18:30:57 2017 +0100
committer Kevin Moore <kevmoo@users.noreply.github.com> Thu Nov 02 10:30:57 2017 -0700
tree a2fbd5c2900ea2913fd134c8992f50397091062d
parent 44977d9bd6c7a6525ef6bac7ba31e01072954656

Ensure children isn't null before accepting (#182)

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56392e5..b4b93de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## 1.0.0
 
+* Fix issue where `accept` could cause an exception.
 * Remove deprecated `escapeHtml` function.
 * Fix compliance with auto-links, including support for email addresses.
 * Updated `ExtensionSet.gitHub` to more closely align with GitHub markdown.

lib/src/ast.dart

diff --git a/lib/src/ast.dart b/lib/src/ast.dart
index 12a79cc..9e4869e 100644
--- a/lib/src/ast.dart
+++ b/lib/src/ast.dart
@@ -43,7 +43,9 @@
 
   void accept(NodeVisitor visitor) {
     if (visitor.visitElementBefore(this)) {
-      for (var child in children) child.accept(visitor);
+      if (children != null) {
+        for (var child in children) child.accept(visitor);
+      }
       visitor.visitElementAfter(this);
     }
   }