TypeError: Type str doesn't support the buffer API

When filing a bug (bug 1264754) against chromium using "ubuntu-bug chromium-browser" and I got this error in the bug report:-

https://bugs.launchpad.net/chromium-browser/+bug/1264754/+attachment/3937075/+files/HookError_chromium_browser.txt

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/report.py", line 197, in _run_hook
    symb['add_info'](report, ui)
  File "/usr/share/apport/package-hooks/chromium-browser.py", line 253, in add_info
    for line in script.communicate()[0].split("\n"): # to str. Size bounded by dmesg buffer.
TypeError: Type str doesn't support the buffer API

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: python3-apport 2.12.5-0ubuntu2.2
Uname: Linux 3.12.0-031200-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashReports:
 640:1000:114:1387281:2013-12-26 21:53:30.862467050 +0000:2013-12-26 21:53:31.862467050 +0000:/var/crash/_usr_bin_pulseaudio.1000.crash
 640:1000:114:4646086:2013-12-27 09:59:06.032582998 +0000:2013-12-27 09:59:07.032582998 +0000:/var/crash/_usr_bin_gnome-control-center.1000.crash
 640:1000:114:24784:2013-12-26 21:03:19.070573568 +0000:2013-12-26 21:03:20.070573568 +0000:/var/crash/_usr_bin_bluez-simple-agent.1000.crash
 640:1000:114:24097657:2013-12-27 11:27:38.688395023 +0000:2013-12-27 11:27:39.688395023 +0000:/var/crash/_opt_spotify_spotify-client_spotify.1000.crash
 640:1000:114:66538142:2013-12-28 21:56:33.319020509 +0000:2013-12-28 21:56:34.319020509 +0000:/var/crash/_usr_bin_shutter.1000.crash
Date: Sat Dec 28 22:49:39 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-06-29 (547 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: Upgraded to saucy on 2013-07-12 (169 days ago)