Limit PHPUnit output and use PHPC script to print core dumps

.travis.yml

@@ -62,6 +62,7 @@ before_script:
   - ulimit -c unlimited -S
 
 script:
-  - ./vendor/bin/phpunit --debug || RESULT=$?
-  - for i in $(find ./ -maxdepth 1 -name 'core*' -print); do gdb `php -r 'echo PHP_BINARY;'` core* -ex "thread apply all bt" -ex "set pagination 0" -batch; done;
-  - if [[ ${RESULT} != 0 ]]; then exit $RESULT ; fi;
+  - vendor/bin/phpunit -v
+
+after_failure:
+  - find . -name 'core*' -exec ${TRAVIS_BUILD_DIR}/.travis/debug-core.sh {} \;

.travis/debug-core.sh

+#!/bin/sh
+
+if [ "${TRAVIS_OS_NAME}" != "osx" ]; then
+    # https://www.ics.uci.edu/~pattis/common/handouts/macmingweclipse/allexperimental/mac-gdb-install.html
+    echo "Cannot debug core files on macOS: ${1}"
+    exit 1
+fi
+
+PHP_BINARY=`which php`
+gdb -batch -ex "bt full" -ex "quit" "${PHP_BINARY}" "${1}"