TO-DROP: let's intercept the log and store it in a file, just in case

This log is in `t/` so that it is uploaded in case of failure.

Signed-off-by: Johannes Schindelin <[email protected]>

ci/lib.sh

@@ -47,6 +47,7 @@ group () {
 		"$@" 2>&1
 		echo $? >exit.status
 	) |
+	tee -a t/"$1".log |
 	sed 's/^\(\([^ ]*\):\([0-9]*\):\([0-9]*:\) \)\(error\|warning\): /::\5 file=\2,line=\3::\1/'
 	res=$(cat exit.status)
 	rm exit.status
@@ -188,6 +189,7 @@ create_failed_test_artifacts () {
 	done
 
 	mkdir -p t/failed-test-artifacts
+	cp "t/*.log" t/failed-test-artifacts/ || : ignore failure
 
 	for test_exit in t/test-results/*.exit
 	do