Handle missing captcha parameter correctly

Fixes #644

diff --git a/src/main/java/org/asamk/signal/commands/RegisterCommand.java b/src/main/java/org/asamk/signal/commands/RegisterCommand.java
index 971e4dd18000bc0ea17e8af4f38172a208ae3a72..1b7e5ef9ca0fe3d1151d3c78853c882246a7b614 100644 (file)
--- a/src/main/java/org/asamk/signal/commands/RegisterCommand.java
+++ b/src/main/java/org/asamk/signal/commands/RegisterCommand.java
@@ -27,7 +27,8 @@ public class RegisterCommand implements RegistrationCommand {
     @Override
     public void handleCommand(final Namespace ns, final RegistrationManager m) throws CommandException {
         final boolean voiceVerification = ns.getBoolean("voice");
     @Override
     public void handleCommand(final Namespace ns, final RegistrationManager m) throws CommandException {
         final boolean voiceVerification = ns.getBoolean("voice");

-        final var captcha = ns.getString("captcha").replace("signalcaptcha://", "");
+        final var captchaString = ns.getString("captcha");
+        final var captcha = captchaString == null ? null : captchaString.replace("signalcaptcha://", "");

 
         try {
             m.register(voiceVerification, captcha);
 
         try {
             m.register(voiceVerification, captcha);