Bug fix: convert nullptr to string

Change-Id: I418de2403730998a6437476e878cd03f4c40cb0d
Signed-off-by: Yuta Doi <yuta-d@witz-inc.co.jp>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/app.cpp b/src/app.cpp
index 93d827f..dca0e74 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -524,7 +524,15 @@ void App::allocateWindowResource(char const *event, char const *drawing_name,
     if (nullptr != new_area) {
         json_object_object_add(json_in, "area", json_object_new_string(new_area));
     }
-    rm::g_new_role = std::string(new_role);  // TODO: workaround
+
+    // TODO: workaround
+    if (nullptr != new_role) {
+        rm::g_new_role = std::string(new_role);
+    }
+    else {
+        rm::g_new_role = std::string("");
+    }
+
     this->pm_.inputEvent(json_in);
 
     // Release json_object