Bug #118686 Cannot access a disposed object: '_ProgressBar' in MySQL Workbench

• Submitted: 19 Jul 9:42
• Modified: 21 Jul 12:24
• Reporter: Girish K s
• Status: Duplicate
• Category: MySQL Workbench
• Severity: S3 (Non-critical)
• Version: MySQL Workbench 8.0.36
• OS: Windows (windows 11)
• CPU Architecture: Any
• Tags: bug 8.0.xx, disposed-object, progressbar, ui-crash, windows, workbench

[19 Jul 9:42] Girish K s

Description:
While creating tables and executing SQL queries, MySQL Workbench unexpectedly threw an error: "Cannot access a disposed object. Object name: '_ProgressBar'". This seems to happen after running multiple statements or during UI refresh.

How to repeat:
Open MySQL Workbench on Windows (e.g., version 8.0.36).

Connect to a local MySQL server (e.g., MySQL 8.0).

Create a new SQL script tab.

Write and execute a script that:

Creates a new database.

Creates multiple tables with several fields (e.g., over 5–10 columns).

Inserts some data or prepares statements.

While the execution is in progress or after it finishes, interact with the Workbench UI (e.g., switch between schemas or click inside the result panel).

The error “Cannot access a disposed object. Object name: '_ProgressBar'” is triggered.

MySQL Workbench shows a crash dialog and stops functioning properly.

[21 Jul 12:24] MySQL Verification Team

Hello Girish,

Thank you for the bug report.
Imho this is duplicate of Bug #83447, please see Bug #83447.

Regards,
Ashwini Patil