Compiler issues

[xunilrj]

Sway compiler can run into a memory flow error (see issues/sway_memory_overflow/) or a memory overlap error (see issues/sway_memory_write_overlap/)

These do not happen anymore on master.

Sway fails to compile due to a type check error occuring when a tuple of a single element is decoded as the decoding will not produce a tuple but only the single element it contained. (see issues/sway_tuple_compiler_error/)

This is indeed correct, because the generated code is using the wrong types. (str[2]) is not a tuple. For a unary tuple we need a trailing comma: (str[2],). The correct version is

let v: (str[2],) = (__to_str_array("*�"),);
        
    let mut buffer = Buffer::new();
    let mut encoded = v.abi_encode(buffer).as_raw_slice();
    log(encoded);

    let decoded = abi_decode::<(str[2],)>(encoded);
    log(from_str_array(v.0) == from_str_array(decoded.0));

And this version compiles.