frequent exponential crashes

[Nairo]

I open a large enough image (between 5Mo to 15Mo), resize it, copy and paste it on a layer of my background. I create a new layer to make a rectangular selection filled with a color to make an outline. I apply a blending mode to it.
I save it. I close the pict and I open another image, same manipulations.
With a little luck, it works.

At the 3rd image, I get a "failed to allocate..." error.
I restart, try again - same error.

And there, 3rd time I restart, I try again, I get this error "unhandled exception" :
----------------
System.Reflection.TargetInvocationException: Une exception a été levée par la cible d'un appel. ---> System.OutOfMemoryException: Une exception de type 'System.OutOfMemoryException' a été levée.
   à Cairo.ImageSurface.get_Data()
   à Pinta.Core.CairoExtensions.ToPixbuf(ImageSurface surfSource) dans D:\a\Pinta\Pinta\Pinta.Core\Extensions\CairoExtensions.cs:ligne 797
   à Pinta.Core.OraFormat.Export(Document document, String fileName, Window parent) dans D:\a\Pinta\Pinta\Pinta.Core\ImageFormats\OraFormat.cs:ligne 191
   à Pinta.Actions.SaveDocumentImplmentationAction.SaveFile(Document document, String file, FormatDescriptor format, Window parent) dans D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentImplementationAction.cs:ligne 243
   à Pinta.Actions.SaveDocumentImplmentationAction.Activated(Object sender, DocumentCancelEventArgs e) dans D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentImplementationAction.cs:ligne 69
   à Pinta.Core.FileActions.RaiseSaveDocument(Document document, Boolean saveAs) dans D:\a\Pinta\Pinta\Pinta.Core\Actions\FileActions.cs:ligne 118
   à Pinta.Core.Document.Save(Boolean saveAs) dans D:\a\Pinta\Pinta\Pinta.Core\Classes\Document.cs:ligne 740
   à Pinta.Actions.SaveDocumentAction.Activated(Object sender, EventArgs e) dans D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentAction.cs:ligne 48
   --- Fin de la trace de la pile d'exception interne ---
   à System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   à System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   à System.Delegate.DynamicInvokeImpl(Object[] args)
   à GLib.Signal.ClosureInvokedCB(Object o, ClosureInvokedArgs args)
   à GLib.Signal.SignalClosure.Invoke(ClosureInvokedArgs args)
   à GLib.Signal.SignalClosure.MarshalCallback(IntPtr raw_closure, Value* return_val, UInt32 n_param_vals, Value* param_values, IntPtr invocation_hint, IntPtr marshal_data)

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it could be nice to be able to adjust the history (keep less action in memory to have more room for editing).
Also, maybe have a selection tool without boolean operation that would take less memory?

[Nairo (nairo-e)]

I forgot to tell, I have the same reaction with Pinta 1.6 - 1.7 and now 1.8 (dev) - on windows 7 and virtual box windows 10.

[grofaty (grofaty)]

1. How much memory (RAM) has your computer?
2. Is it possible to share one of the images (make sure there is nothing private in it) and post exact step-by-steps (or record screen cast).