From a12f01e617c22a5fddca256eb2e469c5bea9cc71 Mon Sep 17 00:00:00 2001
From: Le Tan <tamlokveer@gmail.com>
Date: Wed, 17 Oct 2018 20:51:27 +0800
Subject: [PATCH] TextDocumentLayout: add debug info to investigate the crash

---
 src/vtextdocumentlayout.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/vtextdocumentlayout.cpp b/src/vtextdocumentlayout.cpp
index a6f92e77..91bde4f1 100644
--- a/src/vtextdocumentlayout.cpp
+++ b/src/vtextdocumentlayout.cpp
@@ -140,6 +140,12 @@ void VTextDocumentLayout::blockRangeFromRectBS(const QRectF &p_rect,
     p_last = document()->blockCount() - 1;
     while (block.isValid()) {
         const BlockLayoutInfo *tinfo = VTextBlockData::layoutInfo(block);
+        if (!tinfo->hasOffset()) {
+            qWarning() << "block without offset"
+                       << block.blockNumber() << tinfo->m_offset
+                       << tinfo->m_rect << tinfo->m_rect.isNull();
+        }
+
         V_ASSERT(tinfo->hasOffset());
 
         if (tinfo->bottom() > y) {