1 files changed, 21 insertions, 0 deletions
diff --git a/qutebrowser/misc/earlyinit.py b/qutebrowser/misc/earlyinit.py
index 420f90f9a..ecd3fac1a 100644
--- a/qutebrowser/misc/earlyinit.py
+++ b/qutebrowser/misc/earlyinit.py
@@ -185,6 +185,11 @@ def check_qt_version():
                                                            PYQT_VERSION_STR))
         _die(text)
 
+    if qt_ver == QVersionNumber(5, 12, 0):
+        from qutebrowser.utils import log
+        log.init.warning("Running on Qt 5.12.0. Doing so is unsupported "
+                         "(newer 5.12.x versions are fine).")
+
 
 def check_ssl_support():
     """Check if SSL support is available."""
@@ -274,6 +279,21 @@ def check_optimize_flag():
                          "unexpected behavior may occur.")
 
 
+def webengine_early_import():
+    """If QtWebEngine is available, import it early.
+
+    We need to ensure that QtWebEngine is imported before a QApplication is created for
+    everything to work properly.
+
+    This needs to be done even when using the QtWebKit backend, to ensure that e.g.
+    error messages in backendproblem.py are accurate.
+    """
+    try:
+        from PyQt5 import QtWebEngineWidgets
+    except ImportError:
+        pass
+
+
 def early_init(args):
     """Do all needed early initialization.
 
@@ -298,3 +318,4 @@ def early_init(args):
     configure_pyqt()
     check_ssl_support()
     check_optimize_flag()
+    webengine_early_import()