My Euler2 Solution Throws an Unknown Exception

[morgankenyon]

The following exception is thrown:

Unhandled exception. Wasmtime.WasmtimeException: WebAssembly module 'tinyfs' is not valid: WebAssembly translation error

Caused by:
    Invalid input WebAssembly code at offset 103: type mismatch: expected i32 but nothing on stack
   at Wasmtime.Module.FromBytes(Engine engine, String name, ReadOnlySpan`1 bytes)
   at TinyFS.Cli.Arguments.run(ParseResults`1 parseResults) in C:\dev\tinyfs\cli\Arguments.fs:line 76
   at TinyFS.Cli.Program.main(String[] argv) in C:\dev\tinyfs\cli\Program.fs:line 23
PS C:\dev\tinyfs\examples>

When running this solution to Euler 2

module Euler2

let main () =
    let mutable first = 1
    let mutable second = 2

    let mutable sum = 2
    while second <= 4_000_000 do
        let temp = first + second
        first <- second
        second <- temp

        if second % 2 = 0 then
            sum <- sum + second
        else
            sum <- sum
    sum

[morgankenyon]

I fixed it by changing up my syntax:

module Euler2

let main () =
    let mutable first = 1
    let mutable second = 2

    let mutable sum = 2
    while second <= 4_000_000 do
        let temp = first + second
        first <- second
        second <- temp

        sum <-
            if second % 2 = 0 then
                sum + second
            else
                sum
    sum

But explore if any better messaging could be displayed in this case.