Issue 35931: pdb: "debug print(" crashes with SyntaxError (original) (raw)

debug print( will make pdb crash with a SyntaxError:

% python -c '__import__("pdb").set_trace()'          
--Return--
> <string>(1)<module>()->None
(Pdb) print(
*** SyntaxError: unexpected EOF while parsing
(Pdb) debug print(
ENTERING RECURSIVE DEBUGGER
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib64/python3.7/bdb.py", line 92, in trace_dispatch
    return self.dispatch_return(frame, arg)
  File "/usr/lib64/python3.7/bdb.py", line 151, in dispatch_return
    self.user_return(frame, arg)
  File "/usr/lib64/python3.7/pdb.py", line 293, in user_return
    self.interaction(frame, None)
  File "/usr/lib64/python3.7/pdb.py", line 352, in interaction
    self._cmdloop()
  File "/usr/lib64/python3.7/pdb.py", line 321, in _cmdloop
    self.cmdloop()
  File "/usr/lib64/python3.7/cmd.py", line 138, in cmdloop
    stop = self.onecmd(line)
  File "/usr/lib64/python3.7/pdb.py", line 418, in onecmd
    return cmd.Cmd.onecmd(self, line)
  File "/usr/lib64/python3.7/cmd.py", line 217, in onecmd
    return func(arg)
  File "/usr/lib64/python3.7/pdb.py", line 1099, in do_debug
    sys.call_tracing(p.run, (arg, globals, locals))
  File "/usr/lib64/python3.7/bdb.py", line 582, in run
    cmd = compile(cmd, "<string>", "exec")
  File "<string>", line 1
    print(
         ^
SyntaxError: unexpected EOF while parsing

Example of the API breakage:

/opt/python/3.8-dev/lib/python3.8/pdb.py:321: in _cmdloop
    self.cmdloop()
/opt/python/3.8-dev/lib/python3.8/cmd.py:138: in cmdloop
    stop = self.onecmd(line)
/opt/python/3.8-dev/lib/python3.8/pdb.py:418: in onecmd
    return cmd.Cmd.onecmd(self, line)
/opt/python/3.8-dev/lib/python3.8/cmd.py:217: in onecmd
    return func(arg)
pdb.py:699: in do_debug
    return orig_do_debug(self, cmd)
/opt/python/3.8-dev/lib/python3.8/pdb.py:1097: in do_debug
    code = compile(arg, "<string>", "exec")
E   TypeError: compile() arg 1 must be a string, bytes or AST object

(via https://travis-ci.org/antocuni/pdb/jobs/504061679#L367)