Exception when changing file language mode: Registered script kind should match new script kind

[mjbvz]

Bug Report

🔎 Search Terms

• TS Server
• updateopen
• untitled

🕗 Version & Regression Information

Version: 4.2.0-dev.20210201

This also happens in 4.1 so it is not a regression

💻 Repo

1. In VS Code
2. Create a untitled file: ctrl+n
3. Change the language mode of the file to javascript (ctrl+k ctrl+m)
4. Now change the mode of the file to TypeScript react

🙁 Bug

This sometimes sees to throw an exception.

Here is the tsserver.log

The relevant section seems is below. My understanding of what is happening:

1. VS Code closes ^untitled:Untitled-1 with update open
2. We then try to open it again with a new call to updateOpen
3. The exception happens

Info 134  [12:03:17.700] request:
    {"seq":33,"type":"request","command":"updateOpen","arguments":{"changedFiles":[],"closedFiles":["^untitled:Untitled-1"],"openFiles":[]}}
Info 135  [12:03:17.700] Project '/dev/null/inferredProject1*' (Inferred)
Info 135  [12:03:17.700] 	Files (7)

Info 135  [12:03:17.700] -----------------------------------------------
Info 135  [12:03:17.700] Open files: 
Info 135  [12:03:17.700] 	FileName: /Users/matb/projects/san/e.ts ProjectRootPath: /Users/matb/projects/san
Info 135  [12:03:17.700] 		Projects: /dev/null/inferredProject1*
Perf 135  [12:03:17.700] 33::updateOpen: elapsed time (in milliseconds) 0.3229
Info 136  [12:03:17.700] response:
    {"seq":0,"type":"response","command":"updateOpen","request_seq":33,"success":true,"body":true}
Info 137  [12:03:17.897] request:
    {"seq":34,"type":"request","command":"updateOpen","arguments":{"changedFiles":[],"closedFiles":[],"openFiles":[{"file":"^untitled:Untitled-1","fileContent":"11\n","projectRootPath":"/Users/matb/projects/san","scriptKindName":"TSX"}]}}
Info 138  [12:03:17.898] Starting updateGraphWorker: Project: /dev/null/inferredProject1*
Err 139   [12:03:17.955] Exception on executing command {"seq":34,"type":"request","command":"updateOpen","arguments":{"changedFiles":[],"closedFiles":[],"openFiles":[{"file":"^untitled:Untitled-1","fileContent":"11\n","projectRootPath":"/Users/matb/projects/san","scriptKindName":"TSX"}]}}:

    Debug Failure. Expected 4 === 3. Registered script kind should match new script kind.

    Error: Debug Failure. Expected 4 === 3. Registered script kind should match new script kind.
        at Object.getOrCreateSourceFileByPath [as getSourceFileByPath] (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:149050:34)
        at tryReuseStructureFromOldProgram (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:106865:28)
        at Object.createProgram (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:106396:29)
        at synchronizeHostData (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:148973:26)
        at Proxy.getProgram (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:149065:13)
        at InferredProject.Project.updateGraphWorker (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:153950:53)
        at InferredProject.Project.updateGraph (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:153880:42)
        at ProjectService.assignOrphanScriptInfoToInferredProject (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:156048:25)
        at ProjectService.assignProjectToOpenedScriptInfo (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:157605:26)
        at /Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:157879:97
        at Object.flatMap (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:515:25)
        at ProjectService.applyChangesInOpenFiles (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:157879:41)
        at Session.handlers.ts.Map.ts.getEntries._a.<computed> (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:158934:46)
        at /Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:160818:88
        at IOSession.Session.executeWithRequestId (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:160809:28)
        at IOSession.Session.executeCommand (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:160818:33)
        at IOSession.Session.onMessage (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:160844:35)
        at Interface.<anonymous> (/Users/matb/projects/san/node_modules/typescript/lib/tsserver.js:163507:31)
        at Interface.emit (events.js:315:20)
        at Interface._onLine (readline.js:329:10)
        at Interface._normalWrite (readline.js:474:12)
        at Socket.ondata (readline.js:186:10)
        at Socket.emit (events.js:315:20)
        at addChunk (_stream_readable.js:295:12)
        at readableAddChunk (_stream_readable.js:271:9)
        at Socket.Readable.push (_stream_readable.js:212:10)
        at Pipe.onStreamRead (internal/stream_base_commons.js:186:23)