TS 5.0 internal compiler error: "Debug Failure. Expected 20 <= 19" #52449
Description
Bug Report
🔎 Search Terms
Debug Failure. Expected 20 <= 19
🕗 Version & Regression Information
- This is a crash in Nightly (v5.0.0-dev.20230126)
⏯ Playground Link
Playground link with relevant code
💻 Code
<const T extends/>🙁 Actual behavior
Uncaught (in promise) Error: Debug Failure. Expected 20 <= 19
fail https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:1824
assertLessThanOrEqual https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:1861
assertDiagnosticLocation https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:12898
createFileDiagnostic https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:16567
checkUnusedTypeParameters https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:68475
checkUnusedIdentifiers https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:68393
getSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:40963
getSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:97949
runWithCancellationToken https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:97895
getSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:97948
computeSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:110815
getSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:112409
getSuggestionDiagnostics https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/language/typescript/tsWorker.js:170546
fmr https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:16402
d https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15391
handleMessage https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15376
k https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15182
h https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15151
handleMessage https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15144
onmessage https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:15381
onmessage https://typescript.azureedge.net/cdn/5.0.0-dev.20230126/monaco/dev/vs/base/worker/workerMain.js:2244
🙂 Expected behavior
"use strict";
React.createElement("const", { T: true, extends: true });