cryptic error: v := f(), when f returns no values, panics with evalStaticTypeOf() only supports *CallExpr with 1 result

[thehowl]

Minimal example to reproduce:

package main

func main() {
        n := f()
}

func f() {
        println("hello!")
}

The resulting panic is the following:

panic: evalStaticTypeOf() only supports *CallExpr with 1 result, got () [recovered]
        panic: main/a.gno:4: evalStaticTypeOf() only supports *CallExpr with 1 result, got ()

goroutine 1 [running]:
github.com/gnolang/gno/gnovm/pkg/gnolang.Preprocess.func2.1()
        /home/howl/oc/gno/gnovm/pkg/gnolang/preprocess.go:173 +0x46d
panic({0xbf0b00, 0xc00007d450})
        /usr/lib/go/src/runtime/panic.go:890 +0x263
github.com/gnolang/gno/gnovm/pkg/gnolang.evalStaticTypeOf({0xf651b0?, 0xc000188240?}, {0xf62ed8?, 0xc000501800?}, {0xf5c408?, 0xc000128a20?})
        /home/howl/oc/gno/gnovm/pkg/gnolang/preprocess.go:2020 +0xc5
github.com/gnolang/gno/gnovm/pkg/gnolang.Preprocess.func2({0xc00025ae00?, 0x2, 0x20}, 0x46, 0xc000254524?, {0xf5aaf0, 0xc000128a80?}, 0x3)
        /home/howl/oc/gno/gnovm/pkg/gnolang/preprocess.go:1554 +0x8688
github.com/gnolang/gno/gnovm/pkg/gnolang.transcribe(0xc000131970, {0xc00025ae00?, 0x2, 0x20}, 0x46, 0xf5b170?, {0xf5aaf0?, 0xc000128a80}, 0xc000131447)
        /home/howl/oc/gno/gnovm/pkg/gnolang/transcribe.go:728 +0x4b63
github.com/gnolang/gno/gnovm/pkg/gnolang.transcribe(0xc000131970, {0xc00025ae00?, 0x1, 0x20}, 0x4d, 0xf5b0a0?, {0xf5b170?, 0xc000501800}, 0xc000131677)
        /home/howl/oc/gno/gnovm/pkg/gnolang/transcribe.go:670 +0x5125
github.com/gnolang/gno/gnovm/pkg/gnolang.transcribe(0xc000131970, {0xc00025ae00?, 0x0, 0x20}, 0x0, 0x200?, {0xf5b0a0?, 0xc0002b3b80}, 0xc0001318a7)
        /home/howl/oc/gno/gnovm/pkg/gnolang/transcribe.go:708 +0x4cf3
github.com/gnolang/gno/gnovm/pkg/gnolang.Transcribe({0xf5b0a0?, 0xc0002b3b80}, 0x7ffe8a9f6e65?)
        /home/howl/oc/gno/gnovm/pkg/gnolang/transcribe.go:133 +0xbe
github.com/gnolang/gno/gnovm/pkg/gnolang.Preprocess({0xf651b0, 0xc000188240}, {0xf632d8, 0xc0000ca580}, {0xf5b0a0?, 0xc0002b3b80?})
        /home/howl/oc/gno/gnovm/pkg/gnolang/preprocess.go:149 +0x277
github.com/gnolang/gno/gnovm/pkg/gnolang.(*Machine).runFiles(0xc0000c4fc0, {0xc0000123e8, 0x1, 0x1})
        /home/howl/oc/gno/gnovm/pkg/gnolang/machine.go:520 +0x34e
github.com/gnolang/gno/gnovm/pkg/gnolang.(*Machine).RunFiles(...)

This is not such a weird mistake to do when programming in Go/Gno, so a panic like this with no reference to the incriminated code is hardly helpful to the developer.

(Part of a series of issues encountered while developing gnochess)