diff --git a/bash/start.sh b/bash/start.sh
index 425c2a6..746444a 100755
--- a/bash/start.sh
+++ b/bash/start.sh
@@ -10,9 +10,9 @@
 #. .env
 
 # auto-restart
-AUTO_RESTART=${AUTO_RESTART:-1}      # 1 to enable
-RESTART_DELAY=${RESTART_DELAY:-3}    # seconds
-DONT_RESTART_IF=${DONT_RESTART_IF:0} # exit code
+AUTO_RESTART=${AUTO_RESTART:-1}        # 1 to enable
+RESTART_DELAY=${RESTART_DELAY:-3}      # seconds
+DONT_RESTART_IF=${DONT_RESTART_IF-130} # exit code
 
 # java options
 JAVA_BIN=${JAVA_BIN:-java}   # full path to the java binary
@@ -27,12 +27,12 @@ GC_CONC_THREADS=${GC_CONC_THREADS:-"$(( half=GC_PAR_THREADS / 2, half == 0 ? 1 :
                                     # marker thread count, defaults to half of parallel
 
 # mc options
-MC_FLAGS=${MC_FLAGS:nogui}           # Minecraft flags
+MC_FLAGS=${MC_FLAGS-nogui}           # Minecraft flags
 SERVER_JAR=${SERVER_JAR:-server.jar} # server JAR file
 
 # ---
 
-gcs=(
+declare -A gcs=(
 	[zgc]="-XX:+UseZGC"
 	[shenandoahgc]="-XX:+UseShenandoahGC"
 )
@@ -65,7 +65,7 @@ java_args+=(-jar "${SERVER_JAR}" $MC_FLAGS)
 	echo "Using settings:"
 	echo "Java binary: ${JAVA_BIN?}"
 	# shellcheck disable=SC2145
-	echo "Options: ${java_args[@]@Q} ${}"
+	echo "Options: ${java_args[@]@Q}"
 	echo "Auto restart: $( (( AUTO_RESTART )) && echo 'enabled' || echo 'disabled' )"
 } 2>&1