diff options
Diffstat (limited to 'lib/irb/cmd/subirb.rb')
| -rw-r--r-- | lib/irb/cmd/subirb.rb | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/irb/cmd/subirb.rb b/lib/irb/cmd/subirb.rb index 43364f1393..699b35fcb4 100644 --- a/lib/irb/cmd/subirb.rb +++ b/lib/irb/cmd/subirb.rb @@ -51,7 +51,8 @@ module IRB category "IRB" description "Switches to the session of the given number." - def execute(key) + def execute(key = nil) + raise CommandArgumentError.new("Please specify the id of target IRB job (listed in the `jobs` command).") unless key IRB.JobManager.switch(key) end end |