I can not re-create the same breakpoint(, after my removing it)

[asdf0123]

The sample source code is shown below. The output implies that the second bp=p.createBreakpoint(breakpoint_address) doesn't work.(Version: 0.9.9)

import subprocess
from ptrace.debugger import PtraceDebugger, ProcessExit
from ptrace.debugger.memory_mapping import readProcessMappings
if __name__=="__main__":
	debugger = PtraceDebugger()
	conn = subprocess.Popen(["./helloworld"])
	p = debugger.addProcess(conn.pid, is_attached=False)
	p.attach()
	 
	breakpoint_address = 0x405CD0  # Replace with actual address
	bp=p.createBreakpoint(breakpoint_address)
	print(list(hex(ele) for ele in debugger.dict[conn.pid].breakpoints.keys()))
	p.removeBreakpoint(bp)
	print(list(hex(ele) for ele in debugger.dict[conn.pid].breakpoints.keys()))
	bp=p.createBreakpoint(breakpoint_address)
	print(list(hex(ele) for ele in debugger.dict[conn.pid].breakpoints.keys()))

output:

['0x405cd0']
[]
[]
Traceback (most recent call last):
  File "ptracebug.py", line 17, in <module>
    p.removeBreakpoint(bp)
  File "/root/miniconda3/lib/python3.8/site-packages/ptrace/debugger/process.py", line 759, in removeBreakpoint
    del self.breakpoints[breakpoint.address]
KeyError: 4218064
Exception ignored in: <function Breakpoint.__del__ at 0x7f714e311430>
Traceback (most recent call last):
  File "/root/miniconda3/lib/python3.8/site-packages/ptrace/debugger/breakpoint.py", line 64, in __del__
  File "/root/miniconda3/lib/python3.8/site-packages/ptrace/debugger/breakpoint.py", line 55, in desinstall
  File "/root/miniconda3/lib/python3.8/site-packages/ptrace/debugger/process.py", line 759, in removeBreakpoint
KeyError: 4218064

I viewed the source code and find something confusing. PtraceProcess.removeBreakpoint calls Breakpoint.del, Breakpoint.del calls Breakpoint.desinstall and Breakpoint.desinstall calls PtraceProcess.removeBreakpoint...
INFINITE RECURSION! No wonder there's is an (ignored) exception.

ptrace/debugger/process.py

class PtraceProcess(object):
    #...
    def removeBreakpoint(self, breakpoint):
        del self.breakpoints[breakpoint.address]
    #...

ptrace/debugger/breakpoint.py

class Breakpoint(object):
    #...
    def desinstall(self, set_ip=False):
        """
        Remove the breakpoint from the associated process. If set_ip is True,
        restore the instruction pointer to the address of the breakpoint.
        """
        if not self._installed:
            return
        self._installed = False
        info("Desinstall %s" % self)
        process = self.process()
        if not process:
            return
        if process.running:
            process.writeBytes(self.address, self.old_bytes)
        if set_ip:
            process.setInstrPointer(self.address)
        process.removeBreakpoint(self)
    #...
    def __del__(self):
        try:
            self.desinstall(False)
        except PtraceError:
            pass

To deal with it, i suggest using (set or list) instead of dictionary to record active breakpoints(ptrace/debugger/process.py, Line 162). In the dictionary, the key and the value.address are bound to be the same, so there is redundant information in the data structure.