This may be better asked in a k8s forum, but I'm not aware of a good one, 
and as I've never seen this anywhere but in Go applications, perhaps 
someone here will know about this.

In our enterprise, we have a bunch of k8s clusters.  I have a bunch of Go 
code using the k8s client api to get data from those clusters. For some 
reason, when I attempt to connect to some of those clusters, I get a 
"negative serial number" error.  After some digging, I found that adding 
"godebug (x509negativeserial=1)" to your go.mod will work around this 
problem.

The thing is, I also wrote some code that examines the cluster cert and its 
serial number, and in the cases where I've gotten this error, I've never 
found a serial number that was negative. Perhaps it's negative if it's 
assumed to be a limited number of bits?  I have no idea.

I also saw this error today when someone tried to run "helm" to get 
something on an external web site, and after I did "export 
GODEBUG=x509negativeserial=1", that resolved that problem.

Anyone know anything about this?

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