fix(workspaces): fix buffer may not exists

Author: iamcco

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vim-language-server",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "vim language server",
   "keywords": [
     "viml",
@@ -36,14 +36,14 @@
     "rxjs": "^6.5.5",
     "rxjs-operators": "^1.1.3",
     "shvl": "^2.0.0",
-    "ts-loader": "^7.0.5",
-    "ts-node": "^8.10.2",
-    "tslint": "^6.1.2",
-    "typescript": "^3.8.3",
+    "ts-loader": "^8.0.11",
+    "ts-node": "^9.0.0",
+    "tslint": "^6.1.3",
+    "typescript": "^4.1.2",
     "vscode-languageserver": "^6.1.1",
     "vscode-languageserver-textdocument": "^1.0.1",
     "vscode-uri": "^2.1.2",
-    "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.12"
+    "webpack": "^5.6.0",
+    "webpack-cli": "^4.2.0"
   }
 }

src/server/workspaces.ts

@@ -117,9 +117,9 @@ export class Workspace {
   } {
     let isFunArg: boolean = false;
     let res: Location[] = [];
-    if (/^((g|b):\w+(\.\w+)*|\w+(#\w+)+)$/.test(name)) {
+    if (/^((g|b):\w+(\.\w+)*|\w+(#\w+)+)$/.test(name) && this.buffers[uri]) {
       res = this.getGlobalLocationByUri(name, uri, position, locationType);
-    } else if (/^([a-zA-Z_]\w*(\.\w+)*)$/.test(name)) {
+    } else if (/^([a-zA-Z_]\w*(\.\w+)*)$/.test(name) && this.buffers[uri]) {
       // get function args references first
       res = this.getFunArgLocation(name, uri, position, locationType);
       if (res.length) {