Kernel exception in findfirst

[tanhevg]

MWE:

using CuArrays
xs = cu(rand(10,3,7))
findmin(xs, dims=1)

This simple script blows up with a kernel exception. Logs from running this with julia -g2 are in this gist. This only happens when dims=1, other dims look fine.

The offending code is in findfirst; somehow only the first row of indices is populated; the other two are filled with typemax(Int) after kernel is run.

CuArrays 1.7.2; Julia 1.3.1