Check for nil completion blocks. Fixed #15

2 files changed, 6 insertions, 0 deletions

diff --git a/src/objc/smtp/MCOSMTPOperation.mm b/src/objc/smtp/MCOSMTPOperation.mm
index 5bd5ab3a..d95c434d 100644
--- a/src/objc/smtp/MCOSMTPOperation.mm
+++ b/src/objc/smtp/MCOSMTPOperation.mm
@@ -33,6 +33,9 @@ typedef void (^CompletionType)(NSError *error);
 }
 
 - (void)operationCompleted {
+    if (_completionBlock == NULL)
+        return;
+    
     NSError * error = [NSError mco_errorWithErrorCode:MCO_NATIVE_INSTANCE->error()];
     _completionBlock(error);
 }
diff --git a/src/objc/smtp/MCOSMTPSendOperation.mm b/src/objc/smtp/MCOSMTPSendOperation.mm
index fcad264b..e41a9f5a 100644
--- a/src/objc/smtp/MCOSMTPSendOperation.mm
+++ b/src/objc/smtp/MCOSMTPSendOperation.mm
@@ -81,6 +81,9 @@ private:
 }
 
 - (void)operationCompleted {
+    if (_completionBlock == NULL)
+        return;
+    
     nativeType *op = MCO_NATIVE_INSTANCE;
     if (op->error() == mailcore::ErrorNone) {
         _completionBlock(nil);