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) {