t.Errorf("expected success, got: %v", errs)
	}

	errorCases := []struct {
		name          string
		envs          []core.EnvVar
		expectedError string
	}{{
		name:          "illegal character",
		envs:          []core.EnvVar{{Name: "=abc"}},
		expectedError: `[0].name: Invalid value: "=abc": ` + relaxedEnvVarNameFmtErrMsg,
	}, {
		name:          "zero-length name",

		{"FileSet", Type, 0},
		{"GEQ", Const, 0},
		{"GO", Const, 0},
		{"GOTO", Const, 0},
		{"GTR", Const, 0},
		{"HighestPrec", Const, 0},
		{"IDENT", Const, 0},
		{"IF", Const, 0},
		{"ILLEGAL", Const, 0},
		{"IMAG", Const, 0},
		{"IMPORT", Const, 0},
		{"INC", Const, 0},
		{"INT", Const, 0},
		{"INTERFACE", Const, 0},
		{"IsExported", Func, 13},
		{"IsIdentifier", Func, 13},