[BUG] cannot parse expression with `const int`

[1m1-github]

Describe the bug

int x = 1
const int X = 1
int y = 1
 # next line is ok
_ = x * y
 # next line is NOT ok
_ = X * y

Error: Cannot parse "X * y" as Expression

To Reproduce
Steps to reproduce the behavior.

Expected behavior
both lines should compile

Additional context
Add any other context about the problem here.

[fergalwalsh]

I think there is an inconsistency in the parsing rules for const names. The declaration allows 1 character names but the rest of the code expects >1 character in the name.
The solution for now is to use multi character names.
I'll look into it in more detail to check if we really want to support 1 character names for consts.