audit: distinguish between nil and empty versions

1 files changed, 4 insertions, 2 deletions

diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index be8d7c077..fcb7ed22b 100644
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -603,8 +603,10 @@ class ResourceAuditor
   end
 
   def audit_version
-    if version.to_s.empty?
-      problem "invalid or missing version"
+    if version.nil?
+      problem "missing version"
+    elsif version.to_s.empty?
+      problem "version is set to an empty string"
     elsif not version.detected_from_url?
       version_text = version
       version_url = Version.detect(url, specs)