Merge remote-tracking branch 'origin/5.12' into 5.13

 Conflicts:
	src/android/templates/AndroidManifest.xml
	src/network/ssl/qsslsocket_mac.cpp
	src/widgets/styles/qstylesheetstyle.cpp
	tests/auto/corelib/kernel/qtimer/BLACKLIST
	tests/auto/testlib/selftests/blacklisted/tst_blacklisted.cpp
	tests/auto/testlib/selftests/expected_blacklisted.lightxml
	tests/auto/testlib/selftests/expected_blacklisted.tap
	tests/auto/testlib/selftests/expected_blacklisted.teamcity
	tests/auto/testlib/selftests/expected_blacklisted.txt
	tests/auto/testlib/selftests/expected_blacklisted.xml
	tests/auto/testlib/selftests/expected_blacklisted.xunitxml
	tests/auto/testlib/selftests/expected_float.tap
	tests/auto/testlib/selftests/expected_float.teamcity
	tests/auto/testlib/selftests/expected_float.txt
	tests/auto/testlib/selftests/expected_float.xunitxml

Done-With: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Done-With: Edward Welbourne <edward.welbourne@qt.io>
Done-With: Timur Pocheptsov <timur.pocheptsov@qt.io>
Change-Id: If93cc432a56ae3ac1b6533d0028e4dc497415a52

1 files changed, 4 insertions, 3 deletions

diff --git a/src/widgets/widgets/qplaintextedit.cpp b/src/widgets/widgets/qplaintextedit.cpp
index 0b79a990a9..363422ac74 100644
--- a/src/widgets/widgets/qplaintextedit.cpp
+++ b/src/widgets/widgets/qplaintextedit.cpp
@@ -312,10 +312,11 @@ void QPlainTextDocumentLayout::documentChanged(int from, int charsRemoved, int c
         QTextBlock block = changeStartBlock;
         do {
             block.clearLayout();
-            const int lineCount = block.isVisible() ? 1 : 0;
-            if (block.lineCount() != lineCount) {
+            if (block.isVisible()
+                    ? (block.lineCount() == 0)
+                    : (block.lineCount() > 0)) {
                 blockVisibilityChanged = true;
-                block.setLineCount(lineCount);
+                block.setLineCount(block.isVisible() ? 1 : 0);
             }
             if (block == changeEndBlock)
                 break;