is this not thread safe? https://github.com/pulumi/pulumi/blob/master/sdk/go/auto/stack.go#L467. I'm basically trying to delete a lot of stacks at once using goroutines. however when I run this in goroutines I get

failed to destroy stack: code: 255
, stdout: 
, stderr: error: invalid character 'r' after top-level value

the character is different, but the error is always the same