checkobjmem checks against the memory size of the entire RasterStack when I only want to read one band

[asinghvi17]

julia> sstr = read(rs.SST)
ERROR: required memory 235358208 is greater than system memory 38846464.
Use `lazy=true` if you are loading dataset, and only call `read` on a subset after `view`.
If you beleive this is not correct, pass the keyword `checkmem=false` or set `Rasters.checkmem!(false)`
and try again. These options may crash your system if the file is actually larger than memory.

Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] _no_memory_error(f::Rasters.var"#217#218", bytes::Int64)
   @ Rasters ~/.julia/dev/Rasters/src/utils.jl:352
 [3] _checkmem
   @ ~/.julia/dev/Rasters/src/utils.jl:340 [inlined]
 [4] _checkobjmem
   @ ~/.julia/dev/Rasters/src/utils.jl:338 [inlined]
 [5] _checkobjmem
   @ ~/.julia/dev/Rasters/src/utils.jl:336 [inlined]
 [6] #read#276
   @ ~/.julia/dev/Rasters/src/read.jl:15 [inlined]
 [7] read(x::Raster{…})
   @ Rasters ~/.julia/dev/Rasters/src/read.jl:12
 [8] top-level scope
   @ REPL[138]:1
Some type information was truncated. Use `show(err)` to see complete types.

but rs.SST is just a 5000x5000 float64 grid.

[rafaqz]

Hmm maybe there is mistake in dispatch.

For now there is Rastets.checkmem!(false)

[rafaqz]

Do you have an MWE? I can't reproduce this

[asinghvi17]

Ah unfortunately my only example involved quite a few hacks. Let me see if I can replicate it now though.