math/big: comparison is always true

[tzneal]

cmd/compile/internal/big/natconv.go:304: comparison of identifier nbits >= 0 is always true
math/big/natconv.go:304: comparison of identifier nbits >= 0 is always true

nbits is an unsigned, and a >=0 comparison is performed against it which is always true.

 nbits := uint(_W) // number of unprocessed bits in w

...
   // convert digits of most-significant word (omit leading zeros)
                for nbits >= 0 && w != 0 {
                        i--

(see https://groups.google.com/d/msg/golang-nuts/O4k42ETtWKQ/_ajX7fz5LUEJ for more details)

[griesemer]

https://go-review.googlesource.com/#/c/11267/

[gopherbot]

CL https://golang.org/cl/11267 mentions this issue.