Vim: Sometimes cannot undo

[schontz]

Describe the bug
Sometimes undo u does not work and I get the following error:

TaskQueue: Error running task. Failed to handle key=u. Cannot read property 'getTime' of undefined.

To Reproduce
I am not sure how to reproduce it. If there is a way to turn on logging I am happy to do so and report.

Expected behavior
Undo works.

Environment (please complete the following information):

• Extension Name: vim
• Extension Version: 1.12.2
• OS Version: Darwin x64 18.7.0
• VSCode version: 1.40.2

{
    "messages": [],
    "activationTimes": {
        "codeLoadingTime": 628,
        "activateCallTime": 4,
        "activateResolvedTime": 775,
        "activationReason": {
            "startup": true,
            "extensionId": {
                "value": "vscodevim.vim",
                "_lower": "vscodevim.vim"
            },
            "activationEvent": "*"
        }
    },
    "runtimeErrors": []
}

Additional context
Add any other context about the problem here.

[J-Fields]

Duplicate of https://github.com/VSCodeVim/Vim/issues/4351. This is fixed and will be in a new patch release soon.