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[Bug 1975907] [NEW] cloud-init devel net-convert crash when --debug is enabled

 

Public bug reported:

Since 22.2 enabling "--debug" for "cloud-init devel net-convert" will
make cloud-init crash.

Probably linked to 3e5938c6ae22b9f158f1404f41e3e43738cadff0 and the use
of safe dumper.

Stack trace shows:
Traceback (most recent call last):                                                                                                                                                                                                  
  File "/xyz/git/cloud-init/bin/cloud-init", line 8, in <module>                                                                                                                                         
    sys.exit(main())                                                                                                                                                                                                                
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/cmd/main.py", line 1059, in main                                                                                                       
    retval = util.log_time(                                                                                                                                                                                                         
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/util.py", line 2637, in log_time                                                                                                       
    ret = func(*args, **kwargs)                                                                                                                                                                                                     
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/cmd/devel/net_convert.py", line 136, in handle_args                                                                                    
    "\n".join(["", "Internal State", safeyaml.dumps(ns, noalias=True), ""])                                                                                                                                                         
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/safeyaml.py", line 161, in dumps                                                                                                       
    return yaml.dump(                                                                                                                                                                                                               
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/__init__.py", line 253, in dump                                                                                                             
    return dump_all([data], stream, Dumper=Dumper, **kwds)                                                                                                                                                                          
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/__init__.py", line 241, in dump_all                                                                                                         
    dumper.represent(data)                                                                                                                                                                                                          
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 27, in represent                                                                                                      
    node = self.represent_data(data)                                                                                                                                                                                                
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 58, in represent_data                                                                                                 
    node = self.yaml_representers[None](self, data)                                                                                                                                                                                 
  File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 231, in represent_undefined                                                                                           
    raise RepresenterError("cannot represent an object", data)                                                                                                                                                                      
yaml.representer.RepresenterError: ('cannot represent an object', <cloudinit.net.network_state.NetworkState object at 0x7fa7979ec340>)

i tried to replace to dumper with the unsafe version and it was working
again

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1975907

Title:
  cloud-init devel net-convert crash when --debug is enabled

Status in cloud-init:
  New

Bug description:
  Since 22.2 enabling "--debug" for "cloud-init devel net-convert" will
  make cloud-init crash.

  Probably linked to 3e5938c6ae22b9f158f1404f41e3e43738cadff0 and the
  use of safe dumper.

  Stack trace shows:
  Traceback (most recent call last):                                                                                                                                                                                                  
    File "/xyz/git/cloud-init/bin/cloud-init", line 8, in <module>                                                                                                                                         
      sys.exit(main())                                                                                                                                                                                                                
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/cmd/main.py", line 1059, in main                                                                                                       
      retval = util.log_time(                                                                                                                                                                                                         
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/util.py", line 2637, in log_time                                                                                                       
      ret = func(*args, **kwargs)                                                                                                                                                                                                     
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/cmd/devel/net_convert.py", line 136, in handle_args                                                                                    
      "\n".join(["", "Internal State", safeyaml.dumps(ns, noalias=True), ""])                                                                                                                                                         
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/cloudinit/safeyaml.py", line 161, in dumps                                                                                                       
      return yaml.dump(                                                                                                                                                                                                               
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/__init__.py", line 253, in dump                                                                                                             
      return dump_all([data], stream, Dumper=Dumper, **kwds)                                                                                                                                                                          
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/__init__.py", line 241, in dump_all                                                                                                         
      dumper.represent(data)                                                                                                                                                                                                          
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 27, in represent                                                                                                      
      node = self.represent_data(data)                                                                                                                                                                                                
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 58, in represent_data                                                                                                 
      node = self.yaml_representers[None](self, data)                                                                                                                                                                                 
    File "/xyz/git/cloud-init/lib/python3.8/site-packages/yaml/representer.py", line 231, in represent_undefined                                                                                           
      raise RepresenterError("cannot represent an object", data)                                                                                                                                                                      
  yaml.representer.RepresenterError: ('cannot represent an object', <cloudinit.net.network_state.NetworkState object at 0x7fa7979ec340>)

  i tried to replace to dumper with the unsafe version and it was
  working again

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