From ea7bb0d5fde67ac05d31d08b22b89c9d4bd98c8d Mon Sep 17 00:00:00 2001
From: Jason Simmons <jason-simmons@users.noreply.github.com>
Date: Wed, 28 Mar 2018 14:18:37 -0700
Subject: [PATCH] libtxt: move to the next run if the current run ends before
 the start of the line block (#4891)

Fixes https://github.com/flutter/flutter/issues/15975
---
 third_party/txt/src/txt/paragraph.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/third_party/txt/src/txt/paragraph.cc b/third_party/txt/src/txt/paragraph.cc
index f9d11f457..b2d4f7c70 100644
--- a/third_party/txt/src/txt/paragraph.cc
+++ b/third_party/txt/src/txt/paragraph.cc
@@ -239,6 +239,10 @@ bool Paragraph::ComputeLineBreaks() {
       StyledRuns::Run run = runs_.GetRun(run_index);
       if (run.start >= block_end)
         break;
+      if (run.end < block_start) {
+        run_index++;
+        continue;
+      }
 
       minikin::FontStyle font;
       minikin::MinikinPaint paint;
-- 
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