microsoft / microsoft/TypeScript
Crash: RangeError: Maximum call stack size exceeded in getNameOfSymbolAsWritten via recursive conditional ReturnType
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Description
### 🔎 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
```ts
function clone(): (obj: T) => T extends any ? ReturnType[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_
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the crash with the linked Playground example or by running the reported tsc command against functionOnlyHasThrow_filled_2_unvalidated_mutated_batch6.ts. Trace the reported path through conditionalTypeToTypeNode, typeToTypeNodeWorker, symbolToTypeNode, and getNameOfSymbolAsWritten, then add a regression test showing that this recursive ReturnType case completes without crashing.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100