Merge pull request #939 from zyearn/fix_core_name

remove core before running test

.travis.yml

@@ -17,6 +17,10 @@ env:
 
 before_script:
 - ulimit -c unlimited -S       # enable core dumps
+# The real command should be put into another "bash -c" otherwise it
+# would cause a permission issue. The reason may be that the 'sudo'
+# only promote the 'echo' part but not the whole command.
+- sudo bash -c "echo 'core.%e.%p' > /proc/sys/kernel/core_pattern"
 
 before_install:
 - wget --no-clobber https://github.com/bazelbuild/bazel/releases/download/0.25.1/bazel_0.25.1-linux-x86_64.deb && sudo dpkg -i bazel_0.25.1-linux-x86_64.deb

test/run_tests.sh

@@ -40,6 +40,7 @@ print_bt () {
     # find newest core file
     COREFILE=$(find . -name "core*" -type f -printf "%T@ %p\n" | sort -k 1 -n | cut -d' ' -f 2- | tail -n 1)
     if [ ! -z "$COREFILE" ]; then
+        >&2 echo "corefile=$COREFILE prog=$1"
         gdb -c "$COREFILE" $1 -ex "thread apply all bt" -ex "set pagination 0" -batch;
     fi
 }