problem with lambda & list comprehension

[astrand]

Moved from http://bugzilla.lysator.liu.se/show_bug.cgi?id=1603:

Dear Sirs:

the following Python code line

f = lambda x: [v for v in x]

does not get through the pyobfuscate and generates an error when compiled (see below traceback
report).
Best regards,

Marco Lombardi

---

Traceback (most recent call last):
File "/Users/mlombard/bin/pyobfuscate", line 1101, in ?
main()
File "/Users/mlombard/bin/pyobfuscate", line 1078, in main
cw = CSTWalker(source_no_encoding, pae.pubapi)
File "/Users/mlombard/bin/pyobfuscate", line 125, in init
self.walk(elements, [self.symtab])
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 211, in walk
self.handle_lambdef(elements, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 633, in handle_lambdef
self.walk(node, symtabs + [lambdatab])
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 187, in walk
self.handle_power(elements, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 662, in handle_power
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 203, in walk
self.handle_atom(elements, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 476, in handle_atom
self.walk(node, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 214, in walk
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 187, in walk
self.handle_power(elements, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 662, in handle_power
self.walk(node, symtabs, functioncall)
File "/Users/mlombard/bin/pyobfuscate", line 203, in walk
self.handle_atom(elements, symtabs)
File "/Users/mlombard/bin/pyobfuscate", line 431, in handle_atom
s = tab.lookup(id)
File "/Users/mlombard/bin/pyobfuscate", line 107, in lookup
return self.symtabs[0].lookup(name)
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/symtable.py", line 107, in
lookup
flags = self._table.symbols[name]
KeyError: 'v'