.travis.yml: install Twisted explicitly to work around #2249.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

diff --git a/.travis.yml b/.travis.yml
index 093e8e977f0895a5de12cf9c27371941f9be882a..268ce81c5b01389925a76036eeffa8aeb60e2a3a 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ python:
 before_install:
   - sh -c set
 install:
+  - pip install 'twisted>=0.13.0'
   - pip install 'coveralls==0.4.2'
 before_script: python misc/build_helpers/show-tool-versions.py
 script: coverage run --branch --source=allmydata setup.py test --reporter=timing