Attaching to process then continuing execution does not work

[negasora]

Version and Platform (required):

• Binary Ninja Version: 5.3.5399

Bug Description:
Attaching to an existing process then continuing execution does not work properly.

Steps To Reproduce:
Please provide all steps required to reproduce the behavior:

1. Open helloworld_thread (
2. Run helloworld_thread in a terminal
3. Attach to helloworld_thread in the binja debugger
4. Click any of the step or continue buttons
5. Notice that binja thinks the process is running but no output is printed and the next instruction is not hit

Expected Behavior:
Step/continue work as expected with attached processes

Screenshots/Video Recording:

Binary:
https://github.com/Vector35/debugger/blob/dev/test/binaries/Linux-x86_64/helloworld_thread

[xusheng6]

I suspect that this is caused by some bugs in stepping on HLIL