Qt error: Exception at 0x58083aea,: read access violation at: 0x0, flags = 0x0 (first, 0x58083aea0x0

Qt error: Exception at 0x58083aea,: read access violation at: 0x0, flags = 0x0 (first, 0x58083aea0x0

When Qt5 is used, it is okay at the beginning, and an error is returned when the result needs to be added, as shown below:

Error: Exception at 0x58083aea, code: 0xc0000005: read access violation at: 0x0, flags = 0x0 (first chance)

I haven't solved the problem for a long time. Finally, my senior friend found out that I defined an action: QAction * saveFileAction.

Create a sub-Directory: fileMenu-> addAction (saveFileAction );

However, if saveFileAction is not assigned a value or a region, it should be used without a value! So an error occurs:

Error: Exception at 0x58083aea, code: 0xc0000005: read access violation at: 0x0, flags = 0x0 (first chance)

The error was not found at the beginning, in part because it may not be reported. I encountered a problem when I added a new member variable!

Generally, this error is caused by pointer errors!

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