pyflakes crashed with TypeError in check(): compile() expected string without null bytes

Passing a file including null bytes crashes pyflakes:

$ printf '\0' | pyflakes
Traceback (most recent call last):
  File "/usr/bin/pyflakes", line 5, in <module>
    main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/pyflakes/scripts/pyflakes.py", line 94, in main
    warnings += check(sys.stdin.read(), '<stdin>')
  File "/usr/lib/python2.7/dist-packages/pyflakes/scripts/pyflakes.py", line 28, in check
    tree = compile(codeString, filename, "exec", _ast.PyCF_ONLY_AST)
TypeError: compile() expected string without null bytes

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: pyflakes 0.5.0-2ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4
Uname: Linux 3.8.0-1-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.8-0ubuntu2
Architecture: amd64
Date: Thu Jan 24 16:11:36 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/pyflakes
InstallationDate: Installed on 2010-12-05 (781 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101202)
InterpreterPath: /usr/bin/python2.7
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/pyflakes
PythonArgs: ['/usr/bin/pyflakes']
SourcePackage: pyflakes
Title: pyflakes crashed with TypeError in check(): compile() expected string without null bytes
UpgradeStatus: Upgraded to raring on 2012-11-15 (70 days ago)
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