ia.fetch return empty array but return valid array when setting breakpoint

[licongchao]

Describe the Issue ia.fetch return empty array but return valid array when setting breakpoint

To Reproduce Steps to reproduce the behavior: i followed the sample code to try to get single image from Baslter Camera, When i trigger with ia.fetch(timeout=-1) as buffer it returns empty array. but if i set breakpoint in this line, wait the buffer ready, it can return valid image array

Not sure how to fix this, or Did i miss some message?

[licongchao]

it's my code issue, after queue image, the memory will be cleared, and we should copy the memory if we need to do further process.