stale typescript errors after editing

[aeschli]

Version: 1.121.0-insider (Universal)
Commit: f6cfa2e
Date: 2026-05-19T11:51:53+02:00
Electron: 39.8.8
ElectronBuildId: 13870025
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 24.6.0

While working on the vscode repo, I regularly (every 1-2 hours) I get stale typescript errors that hang around in the editor and problems view right after I made a change.
Further typing in the file does not make the errors go away

The watch tasks running in terminals show no error.

Reload window will make the error go away.

The output view typescript-native (LSP) does not contain the error

typescript-native (LSP) output

2026-05-20 15:02:43.171 [trace] Received response 'textDocument/diagnostic - (9523)' in 2ms.
Result: {
    "kind": "full",
    "items": [
        {
            "range": {
                "start": {
                    "line": 95,
                    "character": 16
                },
                "end": {
                    "line": 95,
                    "character": 27
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'chatService' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 96,
                    "character": 24
                },
                "end": {
                    "line": 96,
                    "character": 43
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'chatSessionsService' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 327,
                    "character": 65
                },
                "end": {
                    "line": 327,
                    "character": 74
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'Workbench' is deprecated.",
            "tags": [
                2
            ]
        },
        {
            "range": {
                "start": {
                    "line": 327,
                    "character": 76
                },
                "end": {
                    "line": 327,
                    "character": 105
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'(contribution: IWorkbenchContributionSignature<[languageFeaturesService: ILanguageFeaturesService, chatWidgetService: IChatWidgetService, chatSlashCommandService: IChatSlashCommandService, harnessService: ICustomizationHarnessService, chatService: IChatService, chatSessionsService: IChatSessionsService, mcpService: IMcpService]>, phase: LifecyclePhase.Restored | LifecyclePhase.Eventually): void' is deprecated.",
            "tags": [
                2
            ],
            "relatedInformation": [
                {
                    "location": {
                        "uri": "file:///Users/martinae/workspaces/vscode/src/vs/workbench/common/contributions.ts",
                        "range": {
                            "start": {
                                "line": 113,
                                "character": 4
                            },
                            "end": {
                                "line": 114,
                                "character": 2
                            }
                        }
                    },
                    "message": "The declaration was marked as deprecated here."
                }
            ]
        },
        {
            "range": {
                "start": {
                    "line": 343,
                    "character": 102
                },
                "end": {
                    "line": 343,
                    "character": 107
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'token' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 365,
                    "character": 56
                },
                "end": {
                    "line": 365,
                    "character": 57
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'i' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 383,
                    "character": 102
                },
                "end": {
                    "line": 383,
                    "character": 107
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'token' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 449,
                    "character": 83
                },
                "end": {
                    "line": 449,
                    "character": 84
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'i' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 487,
                    "character": 102
                },
                "end": {
                    "line": 487,
                    "character": 107
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'token' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 518,
                    "character": 79
                },
                "end": {
                    "line": 518,
                    "character": 80
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'i' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 555,
                    "character": 102
                },
                "end": {
                    "line": 555,
                    "character": 107
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'token' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 642,
                    "character": 65
                },
                "end": {
                    "line": 642,
                    "character": 74
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'Workbench' is deprecated.",
            "tags": [
                2
            ]
        },
        {
            "range": {
                "start": {
                    "line": 642,
                    "character": 76
                },
                "end": {
                    "line": 642,
                    "character": 105
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'(contribution: IWorkbenchContributionSignature<[languageFeaturesService: ILanguageFeaturesService, chatWidgetService: IChatWidgetService, chatAgentService: IChatAgentService, chatAgentNameService: IChatAgentNameService, chatSessionsService: IChatSessionsService]>, phase: LifecyclePhase.Restored | LifecyclePhase.Eventually): void' is deprecated.",
            "tags": [
                2
            ],
            "relatedInformation": [
                {
                    "location": {
                        "uri": "file:///Users/martinae/workspaces/vscode/src/vs/workbench/common/contributions.ts",
                        "range": {
                            "start": {
                                "line": 113,
                                "character": 4
                            },
                            "end": {
                                "line": 114,
                                "character": 2
                            }
                        }
                    },
                    "message": "The declaration was marked as deprecated here."
                }
            ]
        },
        {
            "range": {
                "start": {
                    "line": 659,
                    "character": 11
                },
                "end": {
                    "line": 659,
                    "character": 19
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'accessor' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 906,
                    "character": 68
                },
                "end": {
                    "line": 906,
                    "character": 73
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'token' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 953,
                    "character": 56
                },
                "end": {
                    "line": 953,
                    "character": 61
                }
            },
            "severity": 4,
            "code": 6133,
            "source": "ts",
            "message": "'range' is declared but its value is never read.",
            "tags": [
                1
            ]
        },
        {
            "range": {
                "start": {
                    "line": 1275,
                    "character": 65
                },
                "end": {
                    "line": 1275,
                    "character": 74
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'Workbench' is deprecated.",
            "tags": [
                2
            ]
        },
        {
            "range": {
                "start": {
                    "line": 1275,
                    "character": 76
                },
                "end": {
                    "line": 1275,
                    "character": 105
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'(contribution: IWorkbenchContributionSignature<[historyService: IHistoryService, workspaceContextService: IWorkspaceContextService, searchService: ISearchService, labelService: ILabelService, languageFeaturesService: ILanguageFeaturesService, chatWidgetService: ... 7 more ..., outlineService: IChatSessionsService]>, phase: LifecyclePhase.Restored | LifecyclePhase.Eventually): void' is deprecated.",
            "tags": [
                2
            ],
            "relatedInformation": [
                {
                    "location": {
                        "uri": "file:///Users/martinae/workspaces/vscode/src/vs/workbench/common/contributions.ts",
                        "range": {
                            "start": {
                                "line": 113,
                                "character": 4
                            },
                            "end": {
                                "line": 114,
                                "character": 2
                            }
                        }
                    },
                    "message": "The declaration was marked as deprecated here."
                }
            ]
        },
        {
            "range": {
                "start": {
                    "line": 1383,
                    "character": 65
                },
                "end": {
                    "line": 1383,
                    "character": 74
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'Workbench' is deprecated.",
            "tags": [
                2
            ]
        },
        {
            "range": {
                "start": {
                    "line": 1383,
                    "character": 76
                },
                "end": {
                    "line": 1383,
                    "character": 105
                }
            },
            "severity": 4,
            "code": 6385,
            "source": "ts",
            "message": "'(contribution: IWorkbenchContributionSignature<[languageFeaturesService: ILanguageFeaturesService, chatWidgetService: IChatWidgetService, chatAgentService: IChatAgentService]>, phase: LifecyclePhase.Restored | LifecyclePhase.Eventually): void' is deprecated.",
            "tags": [
                2
            ],
            "relatedInformation": [
                {
                    "location": {
                        "uri": "file:///Users/martinae/workspaces/vscode/src/vs/workbench/common/contributions.ts",
                        "range": {
                            "start": {
                                "line": 113,
                                "character": 4
                            },
                            "end": {
                                "line": 114,
                                "character": 2
                            }
                        }
                    },
                    "message": "The declaration was marked as deprecated here."
                }
            ]
        }
    ]
}
2026-05-20 15:02:43.171 [trace] Received notification 'window/logMessage'.
Params: {
    "type": 3,
    "message": "handled method 'textDocument/diagnostic' (9523) in 206.833µs"
}
2026-05-20 15:02:43.425 [trace] Sending request 'textDocument/codeAction - (9525)'.
Params: {
    "textDocument": {
        "uri": "file:///Users/martinae/workspaces/vscode/src/vs/workbench/contrib/chat/test/browser/aiCustomization/aiCustomizationItemsModel.test.ts"
    },
    "range": {
        "start": {
            "line": 269,
            "character": 18
        },
        "end": {
            "line": 269,
            "character": 18
        }
    },
    "context": {
        "diagnostics": [],
        "triggerKind": 2
    }
}

typescript-native output

2026-05-20 15:11:46.482 [info] 
======== Cache Statistics ========
2026-05-20 15:11:46.482 [info] Open file count:        9
2026-05-20 15:11:46.482 [info] Cached disk files:   7145
2026-05-20 15:11:46.482 [info] Realpath aliases:       0
2026-05-20 15:11:46.482 [info] Project count:          1
2026-05-20 15:11:46.483 [info] Config count:           2
2026-05-20 15:11:46.483 [info] Parse cache size:             7031
2026-05-20 15:11:46.483 [info] Program count:                   1
2026-05-20 15:11:46.483 [info] Extended config cache size:      1
2026-05-20 15:11:46.483 [info] Auto Imports:
2026-05-20 15:11:46.483 [info] 	Unique packages (by realpath): 0
2026-05-20 15:11:46.483 [info] 	Project buckets:
2026-05-20 15:11:46.484 [info] 		/users/martinae/workspaces/vscode/src/tsconfig.json (dirty):
2026-05-20 15:11:46.484 [info] 			Files: 6248
2026-05-20 15:11:46.484 [info] 			Exports: 24390
2026-05-20 15:11:46.484 [info] 	node_modules buckets:
2026-05-20 15:11:46.484 [info] 		/users/martinae/workspaces/vscode:
2026-05-20 15:11:46.484 [info] 			Collected packages: 80
2026-05-20 15:11:46.484 [info] 			Total packages: 1071
2026-05-20 15:11:46.484 [info] 			Files: 310
2026-05-20 15:11:46.484 [info] 			Exports: 10364
2026-05-20 15:11:46.486 [info] 			Recursive search: 18 packages
2026-05-20 15:11:46.486 [info] 
======== Runtime Metrics ========
/gc/cleanups/executed:cleanups = 0
/gc/cleanups/queued:cleanups = 0
/gc/cycles/automatic:gc-cycles = 32
/gc/cycles/forced:gc-cycles = 24
/gc/cycles/total:gc-cycles = 56
/gc/finalizers/executed:finalizers = 0
/gc/finalizers/queued:finalizers = 0
/gc/gogc:percent = 100
/gc/gomemlimit:bytes = 9223372036854775807
/gc/heap/allocs:bytes = 15106967712
/gc/heap/allocs:objects = 71468868
/gc/heap/frees:bytes = 12749782456
/gc/heap/frees:objects = 66422677
/gc/heap/goal:bytes = 4568739050
/gc/heap/live:bytes = 2284148864
/gc/heap/objects:objects = 5046191
/gc/heap/tiny/allocs:objects = 1779785
/gc/limiter/last-enabled:gc-cycle = 0
/gc/scan/globals:bytes = 427434
/gc/scan/heap:bytes = 2175095528
/gc/scan/stack:bytes = 13888
/gc/scan/total:bytes = 2175536850
/gc/stack/starting-size:bytes = 2048
/memory/classes/heap/free:bytes = 206438400
/memory/classes/heap/objects:bytes = 2357185256
/memory/classes/heap/released:bytes = 1514684416
/memory/classes/heap/stacks:bytes = 11730944
/memory/classes/heap/unused:bytes = 217511192
/memory/classes/metadata/mcache/free:bytes = 0
/memory/classes/metadata/mcache/inuse:bytes = 32144
/memory/classes/metadata/mspan/free:bytes = 19047520
/memory/classes/metadata/mspan/inuse:bytes = 29096480
/memory/classes/metadata/other:bytes = 25563632
/memory/classes/os-stacks:bytes = 0
/memory/classes/other:bytes = 6551518
/memory/classes/profiling/buckets:bytes = 11180202
/memory/classes/total:bytes = 4399021704
2026-05-20 15:11:46.487 [info] 
2026-05-20 15:11:46.488 [info] Updated watches in 38.5µs

[lszomoru]

I am running into this at least 5 times a day which refactoring code. Restarting the language server always resolves the issue.

[Download]

Yes but unfortunately languge server keeps crashing

The JS/TS language service crashed 5 times in the last 5 Minutes. This may be caused by a plugin contributed by one of these extensions: GitHub.copilot-chat, p42ai.refactor

[mjbvz]

@RyanCavanaugh @andrewbranch Is there a way to debug which errors are currently stored by the lsp client? Since the trace doesn't show these errors, I wonder if there's a but where they are incorrectly cached somewhere

[DanielRosenwasser]

We would need to see a full server log to see what is happening between the client and the server.

Otherwise, we don't have any way to probe the current view of specific files, but we can look into something there.

[aeschli]

Let me know how to get more complete logs.

What's interesting is that the typescript-native (LSP) output does not contain the errors. So I wonder if the client has not cleared the problems @mjbvz ?