lapack/gonum: check for overflow in Dtgsja
@@ -326,10 +326,8 @@ func (impl Implementation) Dtgsja(jobU, jobV, jobQ lapack.GSVDJob, m, p, n, k, l
for i := 0; i < min(l, m-k); i++ {
a1 := a[(k+i)*lda+n-l+i]
b1 := b[i*ldb+n-l+i]
-
- if a1 != 0 {
gamma := b1 / a1
-
+ if !math.IsInf(gamma, 0) {
// Change sign if necessary.
if gamma < 0 {
bi.Dscal(l-i, -1, b[i*ldb+n-l+i:], 1)
