Make generated files more resilient to crashesv5.15.0-beta1

If m_resource is not initialized when calling a send_* method it will
simply crash. This change checks for it beforehand so we get a warning
instead.

Change-Id: I601f9070a35a1b3e595567991f7e54e9a6572c2d
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/qtwaylandscanner/qtwaylandscanner.cpp b/src/qtwaylandscanner/qtwaylandscanner.cpp
index 05f00beee..3cecb5bcf 100644
--- a/src/qtwaylandscanner/qtwaylandscanner.cpp
+++ b/src/qtwaylandscanner/qtwaylandscanner.cpp
@@ -906,6 +906,11 @@ bool Scanner::process()
                 printEvent(e);
                 printf("\n");
                 printf("    {\n");
+                printf("        Q_ASSERT_X(m_resource, \"%s::%s\", \"Uninitialised resource\");\n", interfaceName, e.name.constData());
+                printf("        if (Q_UNLIKELY(!m_resource)) {\n");
+                printf("            qWarning(\"could not call %s::%s as it's not initialised\");\n", interfaceName, e.name.constData());
+                printf("            return;\n");
+                printf("        }\n");
                 printf("        send_%s(\n", e.name.constData());
                 printf("            m_resource->handle");
                 for (const WaylandArgument &a : e.arguments) {