gantt task duration not rendered when using YYYY-Q date format and absolute end-date

[sberke-intc]

Describe the bug Identified Gantt tasks stopped rendering task duration with version 10.6.1 when using YYYY-Q as the date format and absolute end date

To Reproduce Link to Live Editor: Live Editor link (see last task)

Steps to reproduce the behavior:

A "Does This Work?" task was added to the default gantt example and dateFormat was modified accordingly.

gantt
    title A Gantt Diagram
    dateFormat  YYYY-Q
    section Section
    A task           :a1, 2014-1, 30d
    Another task     :after a1  , 20d
    section Another
    Task in sec      :2014-1  , 12d
    another task     : 24d
    Does This Work?:        :2014-1, 2014-2

1. Change dateFormat to YYYY-Q
2. Update relevant dates to new format
3. Add Task with start and end date using absolute YYYY-Q format
4. Observe the task with absolute YYYY-Q end date
5. See Error

Expected behavior

Compare to comparable gantt chart using default dateFormat YYYY-MM-DD Link to Live Editor

Screenshots The Does This Work? task renders as text only. No visual bar for the start & end dates are rendered:

Desktop (please complete the following information):

• OS: Windows 10
• Browser [e.g. chrome, safari] Microsoft Edge
• Version [e.g. 22] 120.0.2210.121 (Official build) (64-bit

Smartphone (please complete the following information):

NA

Additional context

Identified using mmdc with @mermaid-js/mermaid-cli@10.6.1 Verified using mermaid.live link Reverted mmdc to last known working version @mermaid-js/mermaid-cli@9.1.7

[github-actions[bot]]

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