Error in 'realPath' during 'getApplicableRefactors'

[typescript-bot]

This issue comes from crash dumps in telemetry. We've tried to de-duplicate issues on a best-effort basis, comparing the sequence of methods called and the command requested while ignoring line numbers.
TypeScript version prefix: 4.4.4
VSCode version: 1.61.2
Command requested: getApplicableRefactors
Hitting sessions: 152
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:41684:18)
    at tryResolve (tsserver.js:41661:32)
    at <anonymous> (tsserver.js:41644:69)
    at forEach (tsserver.js:194:30)
    at nodeModuleNameResolverWorker (tsserver.js:41644:25)
    at nodeModuleNameResolver (tsserver.js:41636:16)
    at resolveModuleName (tsserver.js:41405:30)
    at resolveModuleName (tsserver.js:116084:36)
    at resolveNamesWithLocalCache (tsserver.js:116159:38)
    at resolveModuleNames (tsserver.js:116233:20)
    at Project.resolveModuleNames (tsserver.js:161176:45)
    at unknown (tsserver.js:111517:133)
    at resolveModuleNamesWorker (tsserver.js:111783:26)
    at resolveModuleNamesReusingOldState (tsserver.js:111958:19)
    at processImportedModules (tsserver.js:113338:35)
    at findSourceFileWorker (tsserver.js:113139:17)
    at findSourceFile (tsserver.js:113000:26)
    at processImportedModules (tsserver.js:113374:25)
    at findSourceFileWorker (tsserver.js:113139:17)
    at findSourceFile (tsserver.js:113000:26)
    at processImportedModules (tsserver.js:113374:25)
    at findSourceFileWorker (tsserver.js:113139:17)
    at findSourceFile (tsserver.js:113000:26)
    at <anonymous> (tsserver.js:112952:85)
    at getSourceFileFromReferenceWorker (tsserver.js:112919:34)
    at processSourceFile (tsserver.js:112952:13)
    at processRootFile (tsserver.js:112759:13)
    at <anonymous> (tsserver.js:111624:67)
    at forEach (tsserver.js:194:30)
    at createProgram (tsserver.js:111624:16)
    at synchronizeHostData (tsserver.js:156605:26)
    at getProgram (tsserver.js:156737:13)
    at Project.updateGraphWorker (tsserver.js:161733:53)
    at Project.updateGraph (tsserver.js:161662:42)
    at ConfiguredProject.updateGraph (tsserver.js:162644:63)
    at updateProjectIfDirty (tsserver.js:163133:45)
    at Project.getLanguageService (tsserver.js:161280:28)
    at Session.getApplicableRefactors (tsserver.js:168512:32)
    at _a.<computed> (tsserver.js:167223:61)
    at <anonymous> (tsserver.js:168880:88)
    at Session.executeWithRequestId (tsserver.js:168871:28)
    at Session.executeCommand (tsserver.js:168880:33)
    at Session.onMessage (tsserver.js:168906:35)
    at <anonymous> (tsserver.js:171511:31)
    at unknown (suppressed.js:315:20)
    at unknown (suppressed.js:337:10)
    at unknown (suppressed.js:482:12)
    at unknown (suppressed.js:194:10)
    at unknown (suppressed.js:315:20)
    at unknown (suppressed.js:309:12)
    at unknown (suppressed.js:284:9)
    at unknown (suppressed.js:223:10)
    at unknown (suppressed.js:188:23)

[andrewbranch]

This is probably Debug.assert(host.fileExists(real), `${path} linked to nonexistent file ${real}`); in moduleNameResolver.ts, possibly indicating a stale realpath cache. /cc @amcasey if you're interested.

[amcasey]

As something of an aside, how is it that the top stack frame isn't tsserver.js and is apparently a .ts file (should be impossible at runtime?)? /cc @armanio123

[armanio123]

Sounds like it shouldn't happen at runtime IMO. Nonetheless the data is in fact getting a .ts file. I just checked the method that suppressed the file name and it's looking for ts|tsx|js|jsx files so data is there for this to show.

[amcasey]

As @andrewbranch and I discussed offline, we would expect that assert to succeed under normal circumstances, but it's certainly not guaranteed - the file might be deleted in between the calls to realpath and exists or the link might be a dangling pointer.

There's also some question of whether it's actually the assert firing - it could be an exception from a custom host implementation of host.fileExists, which would explain the extra stack frame.

[amcasey]

Looks like there are actually several related stacks with tsserver.js:41684:18 at the top. I think our hashcode only considers the first five frames, so it might already have merged them.

It affects many machines (with different platforms) in many countries, so I don't think it's just one person/enterprise. It may, however, be a single, widely-used extension.

[andrewbranch]

The frame Project.resolveModuleNames makes it pretty unlikely this is a custom host—the Project should be the module resolution host in this case.

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.5.5
VSCode version: 1.64.0
Command requested: getApplicableRefactors
Hitting sessions: 377
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:42243:18)
    at tryResolve (tsserver.js:42220:32)
    at <anonymous> (tsserver.js:42194:69)
    at forEach (tsserver.js:197:30)
    at nodeModuleNameResolverWorker (tsserver.js:42194:25)
    at nodeModuleNameResolver (tsserver.js:42176:16)
    at resolveModuleName (tsserver.js:41916:30)
    at resolveModuleName (tsserver.js:118226:36)
    at resolveNamesWithLocalCache (tsserver.js:118304:38)
    at resolveModuleNames (tsserver.js:118381:20)
    at Project.resolveModuleNames (tsserver.js:164474:45)
    at unknown (tsserver.js:113602:153)
    at resolveModuleNamesWorker (tsserver.js:113871:26)
    at resolveModuleNamesReusingOldState (tsserver.js:113967:24)
    at processImportedModules (tsserver.js:115457:35)
    at findSourceFileWorker (tsserver.js:115240:17)
    at findSourceFile (tsserver.js:115096:26)
    at processImportedModules (tsserver.js:115492:25)
    at findSourceFileWorker (tsserver.js:115240:17)
    at findSourceFile (tsserver.js:115096:26)
    at processImportedModules (tsserver.js:115492:25)
    at findSourceFileWorker (tsserver.js:115240:17)
    at findSourceFile (tsserver.js:115096:26)
    at <anonymous> (tsserver.js:115048:85)
    at getSourceFileFromReferenceWorker (tsserver.js:115014:34)
    at processSourceFile (tsserver.js:115048:13)
    at processRootFile (tsserver.js:114849:13)
    at <anonymous> (tsserver.js:113711:67)
    at forEach (tsserver.js:197:30)
    at createProgram (tsserver.js:113711:16)
    at synchronizeHostData (tsserver.js:159889:26)
    at getProgram (tsserver.js:160021:13)
    at Project.updateGraphWorker (tsserver.js:165035:53)
    at Project.updateGraph (tsserver.js:164964:42)
    at ConfiguredProject.updateGraph (tsserver.js:165957:63)
    at updateProjectIfDirty (tsserver.js:166446:45)
    at Project.getLanguageService (tsserver.js:164578:28)
    at Session.getApplicableRefactors (tsserver.js:171827:32)
    at _a.<computed> (tsserver.js:170536:61)
    at <anonymous> (tsserver.js:172195:88)
    at Session.executeWithRequestId (tsserver.js:172186:28)
    at Session.executeCommand (tsserver.js:172195:33)
    at Session.onMessage (tsserver.js:172221:35)
    at <anonymous> (tsserver.js:174826:31)
    at unknown (suppressed.js:315:20)
    at unknown (suppressed.js:337:10)
    at unknown (suppressed.js:482:12)
    at unknown (suppressed.js:194:10)
    at unknown (suppressed.js:315:20)
    at unknown (suppressed.js:309:12)
    at unknown (suppressed.js:284:9)
    at unknown (suppressed.js:223:10)
    at unknown (suppressed.js:188:23)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.6.2
VSCode version: 1.65.0
Command requested: getApplicableRefactors
Hitting sessions: 513
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:42446:18)
    at tryResolve (tsserver.js:42423:32)
    at <anonymous> (tsserver.js:42397:69)
    at forEach (tsserver.js:183:30)
    at nodeModuleNameResolverWorker (tsserver.js:42397:25)
    at nodeModuleNameResolver (tsserver.js:42379:16)
    at resolveModuleName (tsserver.js:42124:30)
    at resolveModuleName (tsserver.js:119234:36)
    at resolveNamesWithLocalCache (tsserver.js:119312:38)
    at resolveModuleNames (tsserver.js:119389:20)
    at Project.resolveModuleNames (tsserver.js:166274:45)
    at unknown (tsserver.js:114599:153)
    at resolveModuleNamesWorker (tsserver.js:114868:26)
    at resolveModuleNamesReusingOldState (tsserver.js:115044:19)
    at processImportedModules (tsserver.js:116465:35)
    at findSourceFileWorker (tsserver.js:116248:17)
    at findSourceFile (tsserver.js:116104:26)
    at processImportedModules (tsserver.js:116500:25)
    at findSourceFileWorker (tsserver.js:116248:17)
    at findSourceFile (tsserver.js:116104:26)
    at <anonymous> (tsserver.js:116056:85)
    at getSourceFileFromReferenceWorker (tsserver.js:116022:34)
    at processSourceFile (tsserver.js:116056:13)
    at processRootFile (tsserver.js:115857:13)
    at <anonymous> (tsserver.js:114708:67)
    at forEach (tsserver.js:183:30)
    at createProgram (tsserver.js:114708:16)
    at synchronizeHostData (tsserver.js:161659:26)
    at getProgram (tsserver.js:161791:13)
    at Project.updateGraphWorker (tsserver.js:166838:53)
    at Project.updateGraph (tsserver.js:166767:42)
    at ConfiguredProject.updateGraph (tsserver.js:167802:63)
    at updateProjectIfDirty (tsserver.js:168291:45)
    at Project.getLanguageService (tsserver.js:166381:28)
    at Session.getApplicableRefactors (tsserver.js:173676:32)
    at _a.<computed> (tsserver.js:172382:61)
    at <anonymous> (tsserver.js:174044:88)
    at Session.executeWithRequestId (tsserver.js:174035:28)
    at Session.executeCommand (tsserver.js:174044:33)
    at Session.onMessage (tsserver.js:174070:35)
    at <anonymous> (tsserver.js:176705:31)
    at unknown (suppressed.js:315:20)
    at unknown (suppressed.js:903:12)
    at unknown (suppressed.js:81:21)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.6.3
VSCode version: 1.66.0-insider
Command requested: updateOpen
Hitting sessions: 777
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:42436:18)
    at tryResolve (tsserver.js:42413:32)
    at <anonymous> (tsserver.js:42387:69)
    at forEach (tsserver.js:183:30)
    at nodeModuleNameResolverWorker (tsserver.js:42387:25)
    at nodeModuleNameResolver (tsserver.js:42369:16)
    at resolveModuleName (tsserver.js:42114:30)
    at resolveModuleName (tsserver.js:119224:36)
    at resolveNamesWithLocalCache (tsserver.js:119302:38)
    at resolveModuleNames (tsserver.js:119379:20)
    at Project.resolveModuleNames (tsserver.js:166299:45)
    at unknown (suppressed.js:67:65)
    at unknown (tsserver.js:114589:153)
    at resolveModuleNamesWorker (tsserver.js:114858:26)
    at resolveModuleNamesReusingOldState (tsserver.js:115034:19)
    at processImportedModules (tsserver.js:116455:35)
    at findSourceFileWorker (tsserver.js:116238:17)
    at findSourceFile (tsserver.js:116094:26)
    at processImportedModules (tsserver.js:116490:25)
    at findSourceFileWorker (tsserver.js:116238:17)
    at findSourceFile (tsserver.js:116094:26)
    at processImportedModules (tsserver.js:116490:25)
    at findSourceFileWorker (tsserver.js:116238:17)
    at findSourceFile (tsserver.js:116094:26)
    at <anonymous> (tsserver.js:116046:85)
    at getSourceFileFromReferenceWorker (tsserver.js:116012:34)
    at processSourceFile (tsserver.js:116046:13)
    at processRootFile (tsserver.js:115847:13)
    at <anonymous> (tsserver.js:114698:67)
    at forEach (tsserver.js:183:30)
    at createProgram (tsserver.js:114698:16)
    at synchronizeHostData (tsserver.js:161684:26)
    at getProgram (tsserver.js:161816:13)
    at unknown (suppressed.js:38:33)
    at Project.updateGraphWorker (tsserver.js:166863:53)
    at Project.updateGraph (tsserver.js:166792:42)
    at ConfiguredProject.updateGraph (tsserver.js:167827:63)
    at updateProjectIfDirty (tsserver.js:168316:45)
    at ProjectService.assignProjectToOpenedScriptInfo (tsserver.js:170639:29)
    at <anonymous> (tsserver.js:170974:97)
    at flatMap (tsserver.js:508:25)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:170974:41)
    at _a.<computed> (tsserver.js:172133:46)
    at <anonymous> (tsserver.js:174069:88)
    at Session.executeWithRequestId (tsserver.js:174060:28)
    at Session.executeCommand (tsserver.js:174069:33)
    at Session.onMessage (tsserver.js:174095:35)
    at <anonymous> (tsserver.js:176730:31)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.7.4
VSCode version: 1.69.1
Command requested: updateOpen
Hitting sessions: 108
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:43239:18)
    at tryResolve (tsserver.js:43204:32)
    at <anonymous> (tsserver.js:43178:69)
    at forEach (tsserver.js:183:30)
    at nodeModuleNameResolverWorker (tsserver.js:43178:25)
    at nodeModuleNameResolver (tsserver.js:43153:16)
    at resolveModuleName (tsserver.js:42880:30)
    at resolveModuleName (tsserver.js:121159:36)
    at resolveNamesWithLocalCache (tsserver.js:121244:38)
    at resolveModuleNames (tsserver.js:121322:20)
    at Project.resolveModuleNames (tsserver.js:169105:45)
    at unknown (tsserver.js:116462:153)
    at resolveModuleNamesWorker (tsserver.js:116765:26)
    at resolveModuleNamesReusingOldState (tsserver.js:116943:19)
    at processImportedModules (tsserver.js:118373:35)
    at findSourceFileWorker (tsserver.js:118153:17)
    at findSourceFile (tsserver.js:118002:26)
    at <anonymous> (tsserver.js:117954:85)
    at getSourceFileFromReferenceWorker (tsserver.js:117920:34)
    at processSourceFile (tsserver.js:117954:13)
    at processRootFile (tsserver.js:117755:13)
    at <anonymous> (tsserver.js:116571:67)
    at forEach (tsserver.js:183:30)
    at createProgram (tsserver.js:116571:16)
    at synchronizeHostData (tsserver.js:164475:26)
    at getProgram (tsserver.js:164607:13)
    at Project.updateGraphWorker (tsserver.js:169675:53)
    at Project.updateGraph (tsserver.js:169603:42)
    at ConfiguredProject.updateGraph (tsserver.js:170717:63)
    at updateProjectIfDirty (tsserver.js:171206:45)
    at ProjectService.assignProjectToOpenedScriptInfo (tsserver.js:173536:29)
    at <anonymous> (tsserver.js:173871:97)
    at flatMap (tsserver.js:508:25)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:173871:41)
    at _a.<computed> (tsserver.js:175006:46)
    at <anonymous> (tsserver.js:177195:88)
    at Session.executeWithRequestId (tsserver.js:177186:28)
    at Session.executeCommand (tsserver.js:177195:33)
    at Session.onMessage (tsserver.js:177221:35)
    at <anonymous> (tsserver.js:179856:31)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.9.4
VSCode version: 1.74.2
Command requested: definitionAndBoundSpan
Hitting sessions: 2879
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:44411:18)
    at tryResolve (tsserver.js:44374:32)
    at <anonymous> (tsserver.js:44348:69)
    at forEach (tsserver.js:191:30)
    at nodeModuleNameResolverWorker (tsserver.js:44348:25)
    at nodeModuleNameResolver (tsserver.js:44318:16)
    at resolveModuleName (tsserver.js:44045:30)
    at resolveModuleName (tsserver.js:124220:36)
    at resolveNamesWithLocalCache (tsserver.js:124306:38)
    at resolveModuleNames (tsserver.js:124384:20)
    at Project.resolveModuleNames (tsserver.js:173632:45)
    at unknown (tsserver.js:119369:153)
    at resolveModuleNamesWorker (tsserver.js:119672:26)
    at resolveModuleNamesReusingOldState (tsserver.js:119770:24)
    at processImportedModules (tsserver.js:121301:35)
    at findSourceFileWorker (tsserver.js:121081:17)
    at findSourceFile (tsserver.js:120927:26)
    at <anonymous> (tsserver.js:120876:85)
    at getSourceFileFromReferenceWorker (tsserver.js:120842:34)
    at processSourceFile (tsserver.js:120876:13)
    at processRootFile (tsserver.js:120677:13)
    at <anonymous> (tsserver.js:119478:67)
    at forEach (tsserver.js:191:30)
    at createProgram (tsserver.js:119478:16)
    at synchronizeHostData (tsserver.js:168916:26)
    at getProgram (tsserver.js:169030:13)
    at Project.updateGraphWorker (tsserver.js:174207:53)
    at Project.updateGraph (tsserver.js:174135:42)
    at ConfiguredProject.updateGraph (tsserver.js:175301:63)
    at updateProjectIfDirty (tsserver.js:175792:45)
    at Project.getLanguageService (tsserver.js:173743:28)
    at Session.getDefinitionAndBoundSpan (tsserver.js:180624:62)
    at _a.<computed> (tsserver.js:179868:61)
    at <anonymous> (tsserver.js:182024:96)
    at Session.executeWithRequestId (tsserver.js:182015:28)
    at Session.executeCommand (tsserver.js:182024:41)
    at Session.onMessage (tsserver.js:182052:35)
    at <anonymous> (tsserver.js:186208:31)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 4.9.5
VSCode version: 1.74.3
Command requested: updateOpen
Hitting sessions: 601
Five line hash: f80b0e0a8ef4225e432cc9880580c8ff
Stack:

    at unknown (suppressed.ts)
    at realPath (tsserver.js:44416:18)
    at tryResolve (tsserver.js:44379:32)
    at <anonymous> (tsserver.js:44353:69)
    at forEach (tsserver.js:191:30)
    at nodeModuleNameResolverWorker (tsserver.js:44353:25)
    at nodeModuleNameResolver (tsserver.js:44323:16)
    at resolveModuleName (tsserver.js:44050:30)
    at resolveModuleName (tsserver.js:124225:36)
    at resolveNamesWithLocalCache (tsserver.js:124311:38)
    at resolveModuleNames (tsserver.js:124389:20)
    at Project.resolveModuleNames (tsserver.js:173642:45)
    at unknown (tsserver.js:119374:153)
    at resolveModuleNamesWorker (tsserver.js:119677:26)
    at resolveModuleNamesReusingOldState (tsserver.js:119775:24)
    at processImportedModules (tsserver.js:121306:35)
    at findSourceFileWorker (tsserver.js:121086:17)
    at findSourceFile (tsserver.js:120932:26)
    at processImportedModules (tsserver.js:121341:25)
    at findSourceFileWorker (tsserver.js:121086:17)
    at findSourceFile (tsserver.js:120932:26)
    at processImportedModules (tsserver.js:121341:25)
    at findSourceFileWorker (tsserver.js:121086:17)
    at findSourceFile (tsserver.js:120932:26)
    at processImportedModules (tsserver.js:121341:25)
    at findSourceFileWorker (tsserver.js:121086:17)
    at findSourceFile (tsserver.js:120932:26)
    at processImportedModules (tsserver.js:121341:25)
    at findSourceFileWorker (tsserver.js:121086:17)
    at findSourceFile (tsserver.js:120932:26)
    at <anonymous> (tsserver.js:120881:85)
    at getSourceFileFromReferenceWorker (tsserver.js:120847:34)
    at processSourceFile (tsserver.js:120881:13)
    at processRootFile (tsserver.js:120682:13)
    at <anonymous> (tsserver.js:119483:67)
    at forEach (tsserver.js:191:30)
    at createProgram (tsserver.js:119483:16)
    at synchronizeHostData (tsserver.js:168926:26)
    at getProgram (tsserver.js:169040:13)
    at Project.updateGraphWorker (tsserver.js:174217:53)
    at Project.updateGraph (tsserver.js:174145:42)
    at ConfiguredProject.updateGraph (tsserver.js:175311:63)
    at updateProjectIfDirty (tsserver.js:175802:45)
    at ProjectService.assignProjectToOpenedScriptInfo (tsserver.js:178134:29)
    at <anonymous> (tsserver.js:178469:97)
    at flatMap (tsserver.js:524:25)
    at ProjectService.applyChangesInOpenFiles (tsserver.js:178469:41)
    at _a.<computed> (tsserver.js:179841:46)
    at <anonymous> (tsserver.js:182034:96)
    at Session.executeWithRequestId (tsserver.js:182025:28)
    at Session.executeCommand (tsserver.js:182034:41)
    at Session.onMessage (tsserver.js:182062:35)
    at <anonymous> (tsserver.js:186218:31)