}

func TestIssue55030(t *testing.T) {
	// makeSig makes the signature func(typ...)
	makeSig := func(typ Type) {
		par := NewVar(nopos, nil, "", typ)
		params := NewTuple(par)
		NewSignatureType(nil, nil, nil, params, nil, true)
	}

	// makeSig must not panic for the following (example) types:
	// []int
	makeSig(NewSlice(Typ[Int]))

	// string
	makeSig(Typ[String])

	// P where P's core type is string

				*rounded = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))
				return true
			}
		case Complex128:
			if rounded == nil {
				return fitsFloat64(constant.Real(x)) && fitsFloat64(constant.Imag(x))
			}
			re := roundFloat64(constant.Real(x))
			im := roundFloat64(constant.Imag(x))
			if re != nil && im != nil {
				*rounded = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))
				return true
			}

	conf := Config{Importer: imports}
	makePkg := func(src string) {
		f := mustParse(src)
		name := f.PkgName.Value
		pkg, err := conf.Check(name, []*syntax.File{f}, nil)
		if err != nil {
			t.Fatal(err)
		}
		imports[name] = pkg
	}
	makePkg(`package lib; type T[P any] struct{}`)
	makePkg(`package a; import "lib"; var A lib.T[int]`)
	makePkg(`package b; import "lib"; var B lib.T[int]`)

		useMap := make(map[*ast.Ident]Object)
		makePkg := func(src string) *Package {
			pkg, err := typecheck(src, &conf, &Info{Instances: instMap, Uses: useMap})
			// allow error for issue51803
			if err != nil && (pkg == nil || pkg.Name() != "issue51803") {
				t.Fatal(err)
			}
			imports[pkg.Name()] = pkg
			return pkg
		}
		makePkg(lib)
		pkg := makePkg(test.src)

		t.Run(pkg.Name(), func(t *testing.T) {

)

// Tag represents a BCP 47 language tag. It is used to specify an instance of a
// specific language or locale. All language tag values are guaranteed to be
// well-formed.
type Tag compact.Tag

func makeTag(t language.Tag) (tag Tag) {
	return Tag(compact.Make(t))
}

func (t *Tag) tag() language.Tag {
	return (*compact.Tag)(t).Tag()
}

func (t *Tag) isCompact() bool {
	return (*compact.Tag)(t).IsCompact()
}

				*rounded = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))
				return true
			}
		case Complex128:
			if rounded == nil {
				return fitsFloat64(constant.Real(x)) && fitsFloat64(constant.Imag(x))
			}
			re := roundFloat64(constant.Real(x))
			im := roundFloat64(constant.Imag(x))
			if re != nil && im != nil {
				*rounded = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))
				return true
			}

	}
	return constant.MakeFloat64(f)
}

func makeComplex(real, imag constant.Value) constant.Value {
	return constant.BinaryOp(constant.ToFloat(real), token.ADD, constant.MakeImag(constant.ToFloat(imag)))
}

// DefaultLit on both nodes simultaneously;
// if they're both ideal going in they better
// get the same type going out.
// force means must assign concrete (non-ideal) type.

		MakeString(""),
		MakeInt64(1),
		MakeFromLiteral("''", token.CHAR, 0),
		MakeFromLiteral("-1234567890123456789012345678901234567890", token.INT, 0),
		MakeFloat64(1.2),
		MakeImag(MakeFloat64(1.2)),
	}
	for _, val := range values {
		x, y := val, u
		for i := range [2]int{} {
			if i == 1 {
				x, y = y, x
			}
			if got := BinaryOp(x, token.ADD, y); got.Kind() != Unknown {

// bitstream.
func (r *Decoder) Value() constant.Value {
	r.Sync(SyncValue)
	isComplex := r.Bool()
	val := r.scalar()
	if isComplex {
		val = constant.BinaryOp(val, token.ADD, constant.MakeImag(r.scalar()))
	}
	return val
}

func (r *Decoder) scalar() constant.Value {
	switch tag := CodeVal(r.Code(SyncVal)); tag {
	default:
		panic(fmt.Errorf("unexpected scalar tag: %v", tag))

		val = constant.Make(&x)

	case types.IsFloat:
		val = r.mpfloat(b)

	case types.IsComplex:
		re := r.mpfloat(b)
		im := r.mpfloat(b)
		val = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))

	default:
		errorf("unexpected type %v", typ) // panics
		panic("unreachable")
	}

	return
}

func intSize(b *types.Basic) (signed bool, maxBytes uint) {