check for ARGV.first before testing it

Otherwise we will crash if no args are passed. Now we print the usage message

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/tapicero b/bin/tapicero
index 49e73c2..658dace 100755
--- a/bin/tapicero
+++ b/bin/tapicero
@@ -51,7 +51,7 @@ Tapicero::CONFIGS.concat ARGV.grep(/\.ya?ml$/)
 
 # if flags have been set but an action is missing we assume
 # tapicero should run in foreground.
-if ARGV.first.start_with?('--')
+if ARGV.first && ARGV.first.start_with?('--')
   ARGV.unshift '--'
   ARGV.unshift 'run'
 end