[Mono-osx] System.NullReferenceException in NSRunLoop.RunUntil

Maxi Combina maxi.combina at passwordbank.com
Fri May 27 09:38:49 EDT 2011


Hello everyone,

sometimes I get a System.NullReferenceException when running
MonoMac.Foundation.NSRunLoop.RunUntil().
It is not always, it is not easily reproduceable, but it is always the same
(I paste the relevant stack trace below).

Points to consider:
1.- I am manually invoking the NSRunLoop, so maybe I am doing something
wrong, I am not sure.
2.- I do *not* use UISetStatusText anywhere.

This is the statck trace:
-------------------
Unhandled Exception: System.NullReferenceException: Object reference not set
to an instance of an object
at MonoMac.Foundation.NSString.ToString () <0x00009>
at (wrapper dynamic-method)
object.[MonoMac.WebKit.WebView+_WebUIDelegate.Void
UISetStatusText(MonoMac.WebKit.WebView, System.String)]
(MonoMac.Foundation.NSObject,MonoMac.ObjCRuntime.Selector,MonoMac.WebKit.WebView,MonoMac.Foundation.NSString)
<0x0000f>
at (wrapper native-to-managed)
object.[MonoMac.WebKit.WebView+_WebUIDelegate.Void
UISetStatusText(MonoMac.WebKit.WebView, System.String)]
(MonoMac.Foundation.NSObject,MonoMac.ObjCRuntime.Selector,MonoMac.WebKit.WebView,MonoMac.Foundation.NSString)
<0x00137>
at (wrapper managed-to-native)
MonoMac.ObjCRuntime.Messaging.bool_objc_msgSend_IntPtr_IntPtr
(intptr,intptr,intptr,intptr) <0x00003>
at MonoMac.Foundation.NSRunLoop.RunUntil
(MonoMac.Foundation.NSString,MonoMac.Foundation.NSDate) <0x0005f>
-------------------

May this be a MonoMac issue?

Thanks in advance,
Maix

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Maxi Combina
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