noSubstitutionBeforeBuilder cannot correctly convert try-catch clauses containing asycn / await.

[Himenon]

Input Source Code

async function main() {
  try {
    await wait(1000);
  } catch (error) {
    console.log(error);
  }
}

Build with ts2gas

// ...
function main() {
    return __awaiter(this, void 0, void 0, function () {
        var error_1;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    _a.trys.push([0, 2, , 3]);
                    return [4 /*yield*/, wait(1000)];
                case 1:
                    _a.sent();
                    return [3 /*break*/, 3];
                case 2:
                    error_1 = _a.sent();
                    console.log(error);      // <-------- It will be treated as ReferenceError.
                    return [3 /*break*/, 3];
                case 3: return [2 /*return*/];
            }
        });
    });
}

Conversion with TypeScript Playground

// ...
function main() {
    return __awaiter(this, void 0, void 0, function () {
        var error_1;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    _a.trys.push([0, 2, , 3]);
                    return [4 /*yield*/, wait(1000)];
                case 1:
                    _a.sent();
                    return [3 /*break*/, 3];
                case 2:
                    error_1 = _a.sent();
                    console.log(error_1);      // <-------- here
                    return [3 /*break*/, 3];
                case 3: return [2 /*return*/];
            }
        });
    });
}

The judgment here seems to be wrong.

• https://github.com/grant/ts2gas/blob/master/src/index.ts#L168-L177

[PopGoesTheWza]

What is your ts2gas use case? There is likely better solution.

For example: https://github.com/PopGoesTheWza/ts-gas-project-starter

[PopGoesTheWza]

Since you are using async syntax, I assume you are targeting V8 powered GAS.

Have you tried setting the compilerOptions.target property to ES2018,

{
  compilerOptions: {
    target: "ES2018",
  },
}

[Himenon]

https://github.com/grant/ts2gas/issues/58#issuecomment-790405370

That's true. That seems to be the solution to my problem. Thank you, @PopGoesTheWza !

I will leave the handling of this issue to you.

[PopGoesTheWza]

@Himenon do you confirm that changing the target to ES2018 solved the issue?

[Himenon]

Yes, this issue has been resolved by changing the target to ES2018.

[PopGoesTheWza]

Neat. Have a great day.