RUBYOPT: "-W2 --debug-frozen-string-literal"

Author: yahonda

.github/workflows/ruby_head.yml

@@ -18,7 +18,7 @@ jobs:
         yjit-enabled: [0, 1]
     env:
       RUBY_YJIT_ENABLE: ${{ matrix.yjit-enabled }}
-      RUBYOPT: "-W2"
+      RUBYOPT: "-W2 --debug-frozen-string-literal"
       NLS_LANG: AMERICAN_AMERICA.AL32UTF8
       TNS_ADMIN: ./ci/network/admin
       DATABASE_NAME: FREEPDB1