Uncaught Error: Connection is closed.

[Enter steps to reproduce:]

1. ...
2. ...

**Atom**: 1.58.0 x64
**Electron**: 9.4.4
**OS**: Microsoft Windows 10 Pro
**Thrown From**: [ide-python](https://github.com/lgeiger/ide-python) package 1.9.7

### Stack Trace

Uncaught Error: Connection is closed.

```
At C:\Users\Dragon\.atom\packages\ide-python\node_modules\atom-languageclient\node_modules\vscode-jsonrpc\lib\common\connection.js:723

Error: Connection is closed.
at throwIfClosedOrDisposed (/packages/ide-python/node_modules/atom-languageclient/node_modules/vscode-jsonrpc/lib/common/connection.js:723:19)
at Object.sendNotification (/packages/ide-python/node_modules/atom-languageclient/node_modules/vscode-jsonrpc/lib/common/connection.js:805:13)
at LanguageClientConnection._sendNotification (/packages/ide-python/node_modules/atom-languageclient/build/lib/languageclient.js:515:19)
at LanguageClientConnection.didChangeWatchedFiles (/packages/ide-python/node_modules/atom-languageclient/build/lib/languageclient.js:244:14)
at ServerManager.projectFilesChanged (/packages/ide-python/node_modules/atom-languageclient/build/lib/server-manager.js:284:41)
at Function.simpleDispatch (~/AppData/Local/atom/app-1.58.0/resources/app/static/:11:1186925)
at Emitter.emit (~/AppData/Local/atom/app-1.58.0/resources/app/static/:11:1188366)
at s (~/AppData/Local/atom/app-1.58.0/resources/app/static/:11:413685)
at PathWatcher.onNativeEvents (~/AppData/Local/atom/app-1.58.0/resources/app/static/:14:27020)
at ~/AppData/Local/atom/app-1.58.0/resources/app/static/:14:25756
at Function.simpleDispatch (~/AppData/Local/atom/app-1.58.0/resources/app/static/:11:1186925)
at Emitter.emit (~/AppData/Local/atom/app-1.58.0/resources/app/static/:11:1188366)
at NSFWNativeWatcher.onEvents (~/AppData/Local/atom/app-1.58.0/resources/app/static/:14:23002)
at watcher.c.debounceMS (~/AppData/Local/atom/app-1.58.0/resources/app/static/:14:24651)
```

### Commands

```
-5:24.3.0 editor:duplicate-lines (input.hidden-input)
-5:23 editor:move-to-first-character-of-line (input.hidden-input)
-5:21.5.0 editor:select-to-end-of-word (input.hidden-input)
-5:21.2.0 core:select-right (input.hidden-input)
-5:20.9.0 core:backspace (input.hidden-input)
-5:20.6.0 editor:move-to-end-of-screen-line (input.hidden-input)
2x -5:20.2.0 core:backspace (input.hidden-input)
-5:15.4.0 intentions:highlight (input.hidden-input)
-5:15.3.0 core:save (input.hidden-input)
-5:07.3.0 intentions:highlight (input.hidden-input)
10x -5:07.1.0 core:undo (input.hidden-input)
-5:02.9.0 intentions:highlight (input.hidden-input)
-5:02.8.0 core:save (input.hidden-input)
-4:43.9.0 core:backspace (input.hidden-input)
-4:40.8.0 intentions:highlight (input.hidden-input)
-4:40.6.0 core:save (input.hidden-input)
```

### Non-Core Packages

```
atom-ide-base 3.4.0
atom-ide-code-format 1.0.2
atom-ide-datatip 0.25.0
atom-ide-definitions 0.4.2
atom-ide-hyperclick 1.0.11
atom-ide-markdown-service 2.1.0
atom-ide-outline 3.2.0
atom-ide-signature-help 0.16.0
build 0.70.0
build-make 0.13.0
busy-signal 2.0.1
file-icons 2.1.47
gpp-compiler 3.0.7
ide-flex-bison 1.2.1
ide-python 1.9.7
intentions 2.1.1
kite 0.206.0
language-bison-flex 1.0.1
linter 3.4.0
linter-swagger 0.6.1
linter-ui-default 3.4.1
minimap 4.40.0
minimap-linter 2.2.2
screenshot 2.0.0
TabNine 4.0.7
teletype 0.13.4
tool-bar 1.4.4
```

まず、Atom 1.58.0、Electron 9.4.4、Windows 10、ide-python 1.9.7 を使用して報告内容を再現します。報告には実際の再現手順が記載されていません。node_modules/atom-languageclient/node_modules/vscode-jsonrpc/lib/common/connection.js、build/lib/languageclient.js、build/lib/server-manager.js を通して失敗を追跡し、次にトリガーを特定して、キャッチされないエラーが発生しなくなったことを確認します。

索引モデルが issue の本文から書いたものです。