Compiler crash with RangeError: Map maximum size exceeded

[liyanch]

🔎 Search Terms

RangeError: Map maximum size exceeded.

PS: The problem seems as the content of links, #55630 and #53192. But there is not same as the problem. I hope I can get the correct answer to solve the error.

🕗 Version & Regression Information

• This changed between versions v4.9.5.
• I was unable to test this on prior versions because the compilation tool is based on v4.9.5. and most products are based on this compilation tool.

⏯ Playground Link

No response

💻 Code

// Your code here
// Like this, but not same as this.
// For details, see the error reporting function of the error stack.
type Digits = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9';
type T1 = `${Digits}${Digits}${Digits}${Digits}` | undefined;
type T2 = { a: string } | { b: number };

export function f1(x: T1 | null, y: T1 & T2) {
x = y; // Excessive complexity error
}

// Or like this
type Digits = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9';
type T9XXXX = `9${Digits}${Digits}${Digits}${Digits}`;
type TXXXXX = `${Exclude<Digits, '0'>}${Digits}${Digits}${Digits}${Digits}`;
let x: Exclude<TXXXXX, T9XXXX> = '88888';

🙁 Actual behavior

The error stack information is as follows:
RangeError: Map maximum size exceeded
at Map.set ()
at recursiveTypeRelatedTo (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:68762:30)
at isRelatedTo (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:68255:25)
at checkTypeRelatedTo (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:67869:26)
at isTypeRelatedTo (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:67809:24)
at removeSubtypes (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:64284:33)
at getUnionType (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:64388:31)
at checkArrayLiteral (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:76781:17)
at checkExpressionWorker (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:83794:28)
at checkExpression (/Applications/DevEco-Studio.app/Contents/sdk/default/openharmony/ets/build-tools/ets-loader/node_modules/typescript/lib/typescript.js:83713:38)

hvigor ERROR: BUILD FAILED in 3 min 20 s 692 ms

Process finished with exit code -1

🙂 Expected behavior

hvigor SUCCESS: BUILD SUCCESSFUL in 3 min 20 s 692 ms

Process finished with exit code 0

Additional information about the issue

No response

[MartinJohns]

You might want to investigate if updating your TypeScript version is an option. The one you use is over two years old. I'm no team member, but I highly doubt they'll spend resources on backporting a potential fix to such an old version.

[liyanch]

You might want to investigate if updating your TypeScript version is an option. The one you use is over two years old. I'm no team member, but I highly doubt they'll spend resources on backporting a potential fix to such an old version.

But our team can't plan to update the TypeScript version temporarily. Anyway, I ask them for help to fix the problem.

[RyanCavanaugh]

Doesn't repro on 5.8.

We are not able to provide support for older versions of TypeScript

[typescript-bot]

This issue has been marked as "Unactionable" and has seen no recent activity. It has been automatically closed for house-keeping purposes.