Crash: RangeError: Maximum call stack size exceeded in getNameOfSymbolAsWritten via recursive conditional ReturnType

[na7ure-a]

🔎 Search Terms

RangeError: Maximum call stack size exceeded

getNameOfSymbolAsWritten crash

symbolToTypeNode recursion

ReturnType indexed access crash

🕗 Version & Regression Information

Versions tested: 5.7.3, 5.8.3, 5.9.3, Nightly, TS7.

⏯ Playground Link

https://www.typescriptlang.org/zh/play/?target=7&ts=6.0.0-dev.20260319#code/GYVwdgxgLglg9mABBANggpgCgJQC5EA8AKgHyZwBGAVvkdogLwmJGLoAeU6YAJgM6IAhmACeiAPyIASuiggATmCIiADugJRV6OMGRow6EgG0ADAF1E+EwG4gA

💻 Code

function clone(): <T>(obj: T) => T extends any ? ReturnType<typeof clone>[0] : 0;

🙁 Actual behavior

 node built/local/tsc.js -noEmit functionOnlyHasThrow_filled_2_unvalidated_mutated_batch6.ts
D:\github\TypeScript\built\local\_tsc.js:123721
      throw e;
      ^

RangeError: Maximum call stack size exceeded
    at getTextOfNodeFromSourceText (D:\github\TypeScript\built\local\_tsc.js:13034:37)
    at getSourceTextOfNodeFromSourceFile (D:\github\TypeScript\built\local\_tsc.js:13017:10)
    at getTextOfNode (D:\github\TypeScript\built\local\_tsc.js:13045:10)
    at declarationNameToString (D:\github\TypeScript\built\local\_tsc.js:13854:60)
    at getNameOfSymbolAsWritten (D:\github\TypeScript\built\local\_tsc.js:55596:16)
    at createAccessFromSymbolChain (D:\github\TypeScript\built\local\_tsc.js:53234:25)
    at symbolToTypeNode (D:\github\TypeScript\built\local\_tsc.js:53211:26)
    at typeToTypeNodeWorker (D:\github\TypeScript\built\local\_tsc.js:51561:18)
    at typeToTypeNodeHelper (D:\github\TypeScript\built\local\_tsc.js:51342:24)
    at conditionalTypeToTypeNode (D:\github\TypeScript\built\local\_tsc.js:51640:31)

Node.js v22.19.0

🙂 Expected behavior

The compiler should not crash.

Additional information about the issue

No response

[BillionClaw]

Looking into this — the recursive conditional type with ReturnType is hitting a stack overflow in getNameOfSymbolAsWritten. Happy to submit a fix.