debugging

A system I am working on at the moment started giving errors occasionally, say 5 times out of 10,000 messages or so. The error was pretty straightforward: json: cannot unmarshal array into Go struct field Thing.Parts of type Parts The data structure it is referring to looks like this: type Thing struct { Parts Parts } type Parts struct { Part []Part } Which represents the (slightly weird) json structure we receive in a message:...

Many years ago, I was working on a dotnet Windows Forms application. The application had many issues overall: memory leaks, random crashes, data loss, and in this case, the “red x” problem. The problem showed up at random, and instead of a window, dialogue, or control being rendered, it would be replaced with a white box with a red outline and red diagonal cross, and I think some error text in one corner, saying something about GDI handles....