ArgumentError when displaying a view of CuArray

[findmyway]

Describe the bug

ArgumentError when displaying a view of CuArray

To Reproduce
The Minimal Working Example (MWE) for this bug:

cu(@view(rand(3,3)[:, [1]]))

ArgumentError: invalid index: 1.0f0 of type Float32

Stacktrace:
 [1] to_index(::Float32) at ./indices.jl:273
 [2] to_index(::Array{Float32,2}, ::Float32) at ./indices.jl:250
 [3] getindex at ./indices.jl:301 [inlined]
...

Expected behavior
Display the expected SubArray

Environment details (please complete this section)
Details on Julia:

# please post the output of:
versioninfo()

Julia Version 1.3.0-rc3.0
Commit b5ccd0f2ef (2019-10-04 01:57 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Xeon(R) W-2123 CPU @ 3.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, skylake)

[maleadt]

Further reduced: cu(view(ones(1), [1]))

The problem here is that cu much too aggressively converts element types to Float32, and as result here converts the SubArray indices ([1]) to an array of... floating-point indices. Fix incoming.