Errors in code not displayed on the page

[daker]

Starting from this commit 03a944d gunicorn doesn't serve errors in code(ex SyntaxError or IndentationError), with traceback.format_tb, tb_string is an array while make_fail_app is expecting a string so if you have an error somewhere, you get this printed in the console instead showing the real error on the webpage

[2016-11-29 19:23:47 +0000] [8872] [ERROR] Error handling request
Traceback (most recent call last):
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 182, in handle_request
    resp.write(item)
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/http/wsgi.py", line 344, in write
    raise TypeError('%r is not a byte' % arg)
TypeError: ['  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/workers/base.py", line 143, in load_wsgi\n    self.wsgi = self.app.wsgi()\n', '  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 67, in wsgi\n    self.callable = self.load()\n', '  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 65, in load\n    return self.load_wsgiapp()\n', '  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp\n    return util.import_app(self.app_uri)\n', '  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/util.py", line 378, in import_app\n    __import__(module)\n'] is not a byte

You only get the real error on the console when gunicorn starts but if you hit the webpage you get nothing(ERR_CONTENT_LENGTH_MISMATCH) and the ...is not a byte error is displayed on the console

[2016-11-29 19:20:53 +0000] [8867] [INFO] Starting gunicorn 19.6.0
[2016-11-29 19:20:53 +0000] [8867] [INFO] Listening at: http://0.0.0.0:8000 (8867)
[2016-11-29 19:20:53 +0000] [8867] [INFO] Using worker: sync
[2016-11-29 19:20:53 +0000] [8872] [INFO] Booting worker with pid: 8872
[2016-11-29 19:20:53 +0000] [8872] [ERROR] unexpected indent (wsgi.py, line 7)
Traceback (most recent call last):
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/workers/base.py", line 143, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/home/daker/Projets/guni/env/local/lib/python2.7/site-packages/gunicorn/util.py", line 378, in import_app
    __import__(module)
  File "/home/daker/Projets/guni/wsgi.py", line 7
    start_response(status, response_headers)
    ^
IndentationError: unexpected indent