Turn off core dumps before starting the main body of test-release.sh.

[dim]

Summary

Some of the regression tests, such as those for the various sanitizers,
use huge shadow memory maps (showing up in top as 20 TiB). If any of
those ever crashes, your test system's disk will be filled up until
everything falls over. Set the ulimit for core dumps to 0 to prevent
this problem.

[hans]

Sounds reasonable to me.

llvm/utils/release/test-release.sh

 }
 
 # Exit if any command fails
 # Note: pipefail is necessary for running build commands through
 # a pipe (i.e. it changes the output of ``false | tee /dev/null ; echo $?``)
 set -e
 set -o pipefail
 
+# Turn off core dumps, as some test cases can easily fill up even the largest
+# file systems.
+ulimit -c 0
+
 if [ "$do_checkout" = "yes" ]; then
     export_sources
 fi
 
 # Setup the test-suite.  Do this early so we can catch failures before
 # we do the full 3 stage build.
 if [ $do_test_suite = "yes" ]; then
   SandboxDir="$BuildDir/sandbox"