fix #41987

src/vs/base/common/resources.ts

@@ -38,8 +38,13 @@ export function isEqual(first: uri, second: uri, ignoreCase?: boolean): boolean
 }
 
 export function dirname(resource: uri): uri {
+	const dirname = paths.dirname(resource.path);
+	if (resource.authority && dirname && !paths.isAbsolute(dirname)) {
+		return null; // If a URI contains an authority component, then the path component must either be empty or begin with a slash ("/") character
+	}
+
 	return resource.with({
-		path: paths.dirname(resource.path)
+		path: dirname
 	});
 }
 

src/vs/base/test/common/resources.test.ts

@@ -6,7 +6,7 @@
 
 import * as assert from 'assert';
 import URI from 'vs/base/common/uri';
-import { distinctParents } from 'vs/base/common/resources';
+import { distinctParents, dirname } from 'vs/base/common/resources';
 
 suite('Resources', () => {
 
@@ -40,4 +40,14 @@ suite('Resources', () => {
 		assert.equal(distinct[1].toString(), resources[3].toString());
 		assert.equal(distinct[2].toString(), resources[4].toString());
 	});
+
+	test('dirname', (done) => {
+		const f = URI.file('/some/file/test.txt');
+		const d = dirname(f);
+		assert.equal(d.fsPath, '/some/file');
+
+		// does not explode (https://github.com/Microsoft/vscode/issues/41987)
+		URI.from({ scheme: 'file', authority: '/users/someone/portal.h' });
+		done();
+	});
 });

src/vs/workbench/browser/parts/quickopen/quickOpenController.ts

@@ -55,7 +55,6 @@ import { FileKind, IFileService } from 'vs/platform/files/common/files';
 import { scoreItem, ScorerCache, compareItemsByScore, prepareQuery } from 'vs/base/parts/quickopen/common/quickOpenScorer';
 import { getBaseLabel } from 'vs/base/common/labels';
 import { WorkbenchTree } from 'vs/platform/list/browser/listService';
-import { dirname } from 'vs/base/common/paths';
 
 const HELP_PREFIX = '?';
 
@@ -1260,7 +1259,7 @@ export class EditorHistoryEntry extends EditorQuickOpenEntry {
 			const resourceInput = input as IResourceInput;
 			this.resource = resourceInput.resource;
 			this.label = getBaseLabel(resourceInput.resource);
-			this.description = labels.getPathLabel(this.safeDirname(this.resource), contextService, environmentService);
+			this.description = labels.getPathLabel(resources.dirname(this.resource), contextService, environmentService);
 			this.dirty = this.resource && this.textFileService.isDirty(this.resource);
 
 			if (this.dirty && this.textFileService.getAutoSaveMode() === AutoSaveMode.AFTER_SHORT_DELAY) {
@@ -1269,16 +1268,6 @@ export class EditorHistoryEntry extends EditorQuickOpenEntry {
 		}
 	}
 
-	private safeDirname(resource: URI): string | URI {
-		try {
-			return resources.dirname(resource); // workaround for https://github.com/Microsoft/vscode/issues/41987
-		} catch (error) {
-			console.warn(`Unable to resolve to parent resource: ${resource.toString()}`, resource, error);
-
-			return dirname(resource.fsPath);
-		}
-	}
-
 	public getIcon(): string {
 		return this.dirty ? 'dirty' : '';
 	}