Simplification

app/src/main/java/eu/faircode/email/ThrowableWrapper.java

@@ -35,8 +35,6 @@ public class ThrowableWrapper extends Throwable {
 
     public static native String jni_get_safe_message(Throwable ex);
 
-    public static native String jni_to_safe_string(Throwable ex);
-
     public static native String jni_get_safe_stack_trace_string(Throwable ex);
 
     static {
@@ -73,7 +71,9 @@ public class ThrowableWrapper extends Throwable {
     }
 
     public String toSafeString() {
-        return jni_to_safe_string(ex);
+        String name = ex.getClass().getName();
+        String message = getSafeMessage();
+        return (message == null ? name : (name + ": " + message));
     }
 
     @Nullable

app/src/main/jni/fairemail.cc

@@ -32,15 +32,6 @@ Java_eu_faircode_email_ThrowableWrapper_jni_1get_1safe_1message(
     return (jstring) env->CallObjectMethod(ex, mid);
 }
 
-extern "C"
-JNIEXPORT jstring JNICALL
-Java_eu_faircode_email_ThrowableWrapper_jni_1to_1safe_1string(
-        JNIEnv *env, jclass clazz, jthrowable ex) {
-    jclass cls = env->FindClass("java/lang/Throwable");
-    jmethodID mid = env->GetMethodID(cls, "toString", "()Ljava/lang/String;");
-    return (jstring) env->CallObjectMethod(ex, mid);
-}
-
 extern "C"
 JNIEXPORT jstring JNICALL
 Java_eu_faircode_email_ThrowableWrapper_jni_1get_1safe_1stack_1trace_1string(