[committed][testsuite] Show error output in twice-multifile.sh

[Tom de Vries <tdevries@suse.de>]

Hi,

When building dwz with -fsanitize=address, we get:
...
$ make check RUNTESTFLAGS=dwz-tests.exp=twice-multifile.sh
Running src/testsuite/dwz.tests/dwz-tests.exp ...
child process exited abnormally
FAIL: src/testsuite/dwz.tests/twice-multifile.sh
...

The test-case fails because "dwz -m 3 1 2" returns 1, but we don't see
why because the error output is redirected to dwz.err.

Fix this by dumping dwz.err if "dwz -m 3 1 2" status is not zero.

Committed to trunk.

Thanks,
- Tom

[testsuite] Show error output in twice-multifile.sh

2021-03-24  Tom de Vries  <tdevries@suse.de>

	* testsuite/dwz.tests/twice-multifile.sh: Dump dwz.err if dwz status
        is not 0.

---
 testsuite/dwz.tests/twice-multifile.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/testsuite/dwz.tests/twice-multifile.sh b/testsuite/dwz.tests/twice-multifile.sh
index 8a66e25..1ff0166 100644
--- a/testsuite/dwz.tests/twice-multifile.sh
+++ b/testsuite/dwz.tests/twice-multifile.sh
@@ -24,7 +24,10 @@ if [ $(grep -qv "DWARF compression not beneficial" dwz.err \
     exit 1
 fi
 
-[ $status -eq 0 ]
+if [ $status -ne 0 ]; then
+    cat dwz.err
+    exit 1
+fi
 
 smaller-than.sh 1 1.saved