scripts/selector in rvm-0.0.96 vs scripts/selector in rvm-0.0.97

@@ -358,13 +358,14 @@
       unset rvm_ruby_patch_level rvm_ruby_revision rvm_ruby_tag
       rvm_ruby_patch="$string"
     elif $rvm_scripts_path/match "$string" "^u[a-z0-9]" ; then
       unset rvm_ruby_patch_level rvm_ruby_revision rvm_ruby_tag rvm_ruby_patch
       rvm_ruby_user_tag="$string"
-    elif $rvm_scripts_path/match "$string" "^[a-z][a-z]" ; then
+    elif [[ "$string" = "ruby" ]] || [[ "$string" = "jruby" ]] || [[ "$string" = "ree" ]] || [[ "$string" = "macruby" ]] || [[ "$string" = "rbx" ]] || [[ "$string" = "rubinius" ]] || [[ "$string" = "mput" ]] || [[ "$string" = "shyouhei" ]] || [[ "$string" = "ironruby" ]] ; then
       rvm_ruby_interpreter="$string"
     else
       $rvm_scripts_path/log "error" "Unknown ruby string component: '$string'"
+      return 1
     fi
   done
 
   # Unspecified interpreter
   if [[ -z "$rvm_ruby_interpreter" ]] ; then