qt: Add GUIUtil::ExceptionSafeConnect function

Throwing an exception from a slot invoked by Qt's signal-slot connection
mechanism is considered undefined behavior, unless it is handled within
the slot. The GUIUtil::ExceptionSafeConnect function should be used for
exception handling within slots.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 36fcc4d361..0e91f9f385 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -902,4 +902,15 @@ QString MakeHtmlLink(const QString& source, const QString& link)
         QLatin1String("<a href=\"") % link % QLatin1String("\">") % link % QLatin1String("</a>"));
 }
 
+void PrintSlotException(
+    const std::exception* exception,
+    const QObject* sender,
+    const QObject* receiver)
+{
+    std::string description = sender->metaObject()->className();
+    description += "->";
+    description += receiver->metaObject()->className();
+    PrintExceptionContinue(exception, description.c_str());
+}
+
 } // namespace GUIUtil