test suite: Don't try to show stderr if it's empty.

1 files changed, 5 insertions, 3 deletions

diff --git a/test b/test
index c9aaef8..4fdfdbc 100755
--- a/test
+++ b/test
@@ -197,9 +197,11 @@ run() {
 		    set +x
 		    local rv=\$? i
 		    if [ \$rv -eq 0 ]; then rv=1; fi
-            echo "vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv"
-		    cat <"\$STDERR" >&2
-            echo "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^"
+		    if [ -s "\$STDERR" ]; then
+		        echo "vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv"
+		        cat <"\$STDERR" >&2
+		        echo "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^"
+		    fi
 		    [ \$# -eq 0 ] || echo "Error: \$*" >&2
 		    exit \$rv
 		}