Qt error:exception at 0x58083aea,: Read access violation at:0x0, flags=0x0 (first

When using QT5, just start fortunately, the result needs to add something when the error, as follows:

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

Looking for a long time did not solve, the last brother to find, originally I defined an action:qaction*savefileaction

A subdirectory was created:filemenu->addaction (savefileaction);

But there is no assignment to the savefileaction or allocation area, it should be considered not assigned to use it directly! Then there was an error:

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

The reason why I did not find the error, part of the reason is that this error is likely not to be false, I was added a member variable when the problem occurs!

Generally speaking, this error is mostly a pointer problem!



Qt error:exception at 0x58083aea,: Read access violation at:0x0, flags=0x0 (first