Container infrastructure: APT packages not installed for jobs created with matrix.include

[fwalch]

For the following .travis.yml, APT packages will not be installed for the job created by matrix.include:

sudo: false
language: c
os:
  - linux
compiler: gcc-4.4
matrix:
  include:
    - compiler: gcc-4.5

addons:
  apt:
    packages:
      - gcc-4.4
      - gcc-4.5

script:
  - which $CC

Log (note that "Installing APT Packages (BETA)" is missing):

...
$ export CC=gcc-4.5
$ gcc-4.5 --version
/home/travis/build.sh: line 45: gcc-4.5: command not found

This can be fixed by adding os: linux to the matrix.include job:

diff --git a/.travis.yml b/.travis.yml
index a8f2082..b03875c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,8 @@ os:
 compiler: gcc-4.4
 matrix:
   include:
-    - compiler: gcc-4.5
+    - os: linux
+      compiler: gcc-4.5

 addons:
   apt:

Log:

Installing APT Packages (BETA)
...
$ export CC=gcc-4.5
$ gcc-4.5 --version
gcc-4.5 (Ubuntu/Linaro 4.5.3-12ubuntu2) 4.5.3

[BanzaiMan]

matrix.include jobs do not inherit from the outside. If you want the APT addon, you can do:

sudo: false
language: c
os:
  - linux
compiler: gcc-4.4
matrix:
  include:
    - compiler: gcc-4.5
      addons:
        apt:
          packages:
            - gcc-4.4
            - gcc-4.5


addons:
  apt:
    packages:
      - gcc-4.4
      - gcc-4.5

script:
  - which $CC