fix: any output of compose was redirected to standard error.

bin/compose-core

@@ -3107,26 +3107,28 @@ launch_docker_compose() {
 
     {
         {
-            if [ -z "$COMPOSE_DISABLE_DOCKER_COMPOSE_STORE" ]; then
-                cd "/var/lib/compose/docker-compose/$sha/$project"
-            else
-                cd "$docker_compose_dir"
-            fi
-            if [ -f ".env" ]; then
-                debug "${WHITE}.env$NORMAL for $DARKYELLOW$SERVICE_PACK$NORMAL:"
-                debug "$(cat ".env" | prefix "  $GRAY|$NORMAL ")"
-            fi
-            debug "${WHITE}docker-compose.yml$NORMAL for $DARKYELLOW$SERVICE_PACK$NORMAL:"
-            debug "$(cat "docker-compose.yml" | prefix "  $GRAY|$NORMAL ")"
-            debug "${WHITE}Launching$NORMAL: docker-compose $@"
-            if [ "$DRY_COMPOSE_RUN" ]; then
-                echo docker-compose "$@"
-            else
-                docker-compose "$@"
-            fi
-            echo "$?" > "$docker_compose_dir/.data/errlvl"
-        } | _save stdout
-    } 3>&1 1>&2 2>&3 | _save stderr 3>&1 1>&2 2>&3
+            {
+                if [ -z "$COMPOSE_DISABLE_DOCKER_COMPOSE_STORE" ]; then
+                    cd "/var/lib/compose/docker-compose/$sha/$project"
+                else
+                    cd "$docker_compose_dir"
+                fi
+                if [ -f ".env" ]; then
+                    debug "${WHITE}.env$NORMAL for $DARKYELLOW$SERVICE_PACK$NORMAL:"
+                    debug "$(cat ".env" | prefix "  $GRAY|$NORMAL ")"
+                fi
+                debug "${WHITE}docker-compose.yml$NORMAL for $DARKYELLOW$SERVICE_PACK$NORMAL:"
+                debug "$(cat "docker-compose.yml" | prefix "  $GRAY|$NORMAL ")"
+                debug "${WHITE}Launching$NORMAL: docker-compose $@"
+                if [ "$DRY_COMPOSE_RUN" ]; then
+                    echo docker-compose "$@"
+                else
+                    docker-compose "$@"
+                fi
+                echo "$?" > "$docker_compose_dir/.data/errlvl"
+            } | _save stdout
+        } 3>&1 1>&2 2>&3 | _save stderr
+    } 3>&1 1>&2 2>&3
     if tail -n 1 "$docker_compose_dir/.data/stderr" | egrep "Service .+ failed to build: Error getting container [0-9a-f]+ from driver devicemapper: (open|Error mounting) /dev/mapper/docker-.*: no such file or directory$" >/dev/null 2>&1; then
         err "Detected bug https://github.com/docker/docker/issues/4036 ... "
         err "Please re-launch your command, or switch from 'devicemapper' driver to 'overlayfs' or 'aufs'."