travis: phpdbg added to allow_failures

.travis.yml

@@ -13,10 +13,14 @@ matrix:
         - php: 5.6
           env: dependencies="--prefer-lowest --prefer-stable" PHP_BIN=php
         - php: 7.0
-          env: coverage="--coverage ./coverage.xml --coverage-src ./src" PHP_BIN=phpdbg
+          env: coverage="on"
+
+    allow_failures:
+        - php: 7.0
+          env: coverage="on"
 
 script:
-    - vendor/bin/tester -p $PHP_BIN tests -s $coverage
+    - vendor/bin/tester -p $PHP_BIN tests -s $coverageArgs
     - php temp/code-checker/src/code-checker.php --short-arrays
 
 after_failure:
@@ -27,11 +31,12 @@ before_script:
     # Install Nette Tester & Code Checker
     - travis_retry composer update --no-interaction --prefer-dist $dependencies
     - travis_retry composer create-project nette/code-checker temp/code-checker ~2.5 --no-interaction
+    - if [ coverage == "on" ]; then PHP_BIN=phpdbg; coverageArgs="--coverage ./coverage.xml --coverage-src ./src"; fi
 
 after_script:
     # Report Code Coverage
     - >
-      if [ "$coverage" != "" ]; then
+      if [ "$coverage" == "on" ]; then
       wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar
       && php coveralls.phar --verbose --config tests/.coveralls.yml
       || true; fi