Bug 1180189 - Fix crash in mozilla::a11y::HTMLTableRowAccessible::GroupPosition, r=MarcoZ

2015-07-14 09:27:26 +02:00
parent b9b58cf5aa
commit 2f05a546b3
1 changed files with 3 additions and 2 deletions
--- a/accessible/html/HTMLTableAccessible.cpp
+++ b/accessible/html/HTMLTableAccessible.cpp
@@ -373,8 +373,9 @@ GroupPos
 HTMLTableRowAccessible::GroupPosition()
 {
  int32_t count = 0, index = 0;
-  if (nsCoreUtils::GetUIntAttr(nsAccUtils::TableFor(this)->GetContent(),
-                               nsGkAtoms::aria_rowcount, &count) &&
+  Accessible* table = nsAccUtils::TableFor(this);
+  if (table && nsCoreUtils::GetUIntAttr(table->GetContent(),
+                                        nsGkAtoms::aria_rowcount, &count) &&
      nsCoreUtils::GetUIntAttr(mContent, nsGkAtoms::aria_rowindex, &index)) {
    return GroupPos(0, index, count);
  }