Bug 1134667 - Check length of text run before checking line break in reflow of ruby base container. r=jfkthame

2015-02-20 13:43:35 +13:00
parent 318da09681
commit cdb84ae6fd
1 changed files with 4 additions and 0 deletions
--- a/layout/generic/nsRubyBaseContainerFrame.cpp
+++ b/layout/generic/nsRubyBaseContainerFrame.cpp
@@ -623,6 +623,10 @@ LineBreakBefore(const nsHTMLReflowState& aReflowState, nsRubyBaseFrame* aFrame)
    iter.SetOriginalOffset(textFrame->GetContentOffset());
    uint32_t pos = iter.GetSkippedOffset();
    gfxTextRun* textRun = textFrame->GetTextRun(nsTextFrame::eInflated);
+    if (pos >= textRun->GetLength()) {
+      // The text frame contains no character at all.
+      return gfxBreakPriority::eNoBreak;
+    }
    // Return whether we can break before the first character.
    if (textRun->CanBreakLineBefore(pos)) {
      return gfxBreakPriority::eNormalBreak;