Fixes #2012 branches w/o dates can cause issues

CHANGELOG.md

@@ -25,6 +25,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## Fixed
 
+- Fixes [#2012](https://github.com/gitkraken/vscode-gitlens/issues/2012) - 'Gitlens: Open Changes with Revision...' results in error
 - Fixes [#2014](https://github.com/gitkraken/vscode-gitlens/issues/2014) - '#' encoded incorrectly
 - Fixes [#1787](https://github.com/gitkraken/vscode-gitlens/issues/1787) - Remove '-review' from Gerrit Remote reviewDomain() — thanks to [PR #1954](https://github.com/gitkraken/vscode-gitlens/pull/1954) by Felipe Santos ([@felipecrs](https://github.com/felipecrs))
 - Fixes [#1902](https://github.com/gitkraken/vscode-gitlens/issues/1902) - Support replacing mirror/replica domain with main domain for remote provider — thanks to [PR #1954](https://github.com/gitkraken/vscode-gitlens/pull/1954) by Felipe Santos ([@felipecrs](https://github.com/felipecrs))

src/git/parsers/branchParser.ts

@@ -60,7 +60,7 @@ export class GitBranchParser {
 					name,
 					remote,
 					current.charCodeAt(0) === 42, // '*',
-					new Date(date),
+					date ? new Date(date) : undefined,
 					// Stops excessive memory usage -- https://bugs.chromium.org/p/v8/issues/detail?id=2869
 					ref == null || ref.length === 0 ? undefined : ` ${ref}`.substr(1),
 					// Stops excessive memory usage -- https://bugs.chromium.org/p/v8/issues/detail?id=2869