1 files changed, 9 insertions, 1 deletions
diff --git a/lib/gitlab/ci/config/interpolation/inputs/base_input.rb b/lib/gitlab/ci/config/interpolation/inputs/base_input.rb
index 5648c4d31ea..ba519776635 100644
--- a/lib/gitlab/ci/config/interpolation/inputs/base_input.rb
+++ b/lib/gitlab/ci/config/interpolation/inputs/base_input.rb
@@ -62,7 +62,15 @@ module Gitlab
               end
 
               # validate provided value
-              error("provided value is not a #{self.class.type_name}") unless valid_value?(actual_value)
+              return error("provided value is not a #{self.class.type_name}") unless valid_value?(actual_value)
+
+              validate_regex!
+            end
+
+            def validate_regex!
+              return unless spec.key?(:regex)
+
+              error('RegEx validation can only be used with string inputs')
             end
 
             def error(message)