Macro interpreter coerces to Int32 in arithmetic operations

[joatca]

In the following code which attempts to do 64-bit unsigned arithmetic in a macro, values get coerced to Int32 resulting in:

in bug.cr:7: Invalid Int32: 4294967299

macro add
  {% x = 4294967297_u64 %}
  puts "{{ x }}: {{ x.kind }}"
  {% y = x + 2_u64 %}
  puts "{{ y }}: {{ y.kind }}"
  {% z = y + 2_u64 %}
 puts "{{ z }}: {{ z.kind }}"
end

add

Version:
Crystal 0.24.2 (2018-03-19)

LLVM: 6.0.0
Default target: x86_64-pc-linux-gnu

[straight-shoota]

Reduced example:

{{ (1_u64 + 2_u64).kind }} # => :i32

The reason for this is that NumberLiteral#kind is :int32 by default and not appropriately set in the macro operation.