Cryptic compiler error on using non-int parameters in make

[kyegupov]

The following code compiles by mainline Go:

buf := make([]byte, x.methodReturningUint64())

but, when attempting to use that code in TinyGo, it crashes with the following error:

Call parameter type does not match function signature!
  %10 = call i64 @"(TypeOfX).methodReturningUint64"(i32 %8, i8* %9, i8* undef), !dbg !24845
 i32  call void @runtime.sliceBoundsCheckMake(i64 %10, i64 %10, i8* undef), !dbg !24846

[aykevl]

On which target is this an issue? I'm asking because this case should be tested in testdata/slice.go, and I can't reproduce on AVR either.

[kyegupov]

Sorry, the target is WebAssembly.

[aykevl]

I managed to reproduce this, with the following code:

var x []byte

func main() {
	buf := make([]byte, foo())
	x = buf
}

func foo() uint64 {
	return 3
}

Apparently there is a difference between uint64(3) and foo(). This is why the tests pass but the code here still fails. I'll have to investigate why this is.

[aykevl]

And this is a bug on all non-64-bit targets I just tested (avr, wasm, cortex-m). So it's not limited to WebAssembly.

[deadprogram]

I think this issue is now fixed in the dev branch, is that correct @aykevl ?

[aykevl]

Yes, it should be fixed.