When c = ∞, z = 0 and 0 does not have a modular inverse, triggering
undefined behavior (recently changed to returning nil) in ModInverse.
Unclear how this used to work anyway. Looks like ModInverse was
leaving the receiver untouched, making zInv = 0 when pool = nil.
Fixesgolang/go#25199
Change-Id: Ib39abf59f0e71cf43cdb5836142ebdd3b206fb3f
Reviewed-on: https://go-review.googlesource.com/110695
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
Package bn256 implements a particular bilinear group at the 128-bit
security level.
R=golang-dev, remyoudompheng, r, r, akumar
CC=golang-dev
https://golang.org/cl/6402052
Filippo Valsorda
Adam Langley