fix(_comp_delimited,cvs): add guards against set -o nounset

Author: akinomyoga

bash_completion

@@ -827,7 +827,8 @@ _comp_delimited()
                     fi
                 done
             done
-            COMPREPLY=($(compgen -W '"${COMPREPLY[@]}"' -- "${cur##*"$delimiter"}"))
+            ((${#COMPREPLY[@]})) &&
+                COMPREPLY=($(compgen -W '"${COMPREPLY[@]}"' -- "${cur##*"$delimiter"}"))
         fi
     else
         COMPREPLY=($(compgen "$@" -- "${cur##*"$delimiter"}"))

completions/cvs

@@ -41,7 +41,8 @@ _comp_xfunc_cvs_roots()
     [[ -v CVSROOT ]] && cvsroots=("$CVSROOT")
     [[ -r ~/.cvspass ]] && cvsroots+=($(awk '{ print $2 }' ~/.cvspass))
     [[ -r CVS/Root ]] && mapfile -tO ${#cvsroots[@]} cvsroots <CVS/Root
-    COMPREPLY=($(compgen -W '"${cvsroots[@]}"' -- "$cur"))
+    ((${#cvsroots[@]})) &&
+        COMPREPLY=($(compgen -W '"${cvsroots[@]}"' -- "$cur"))
     __ltrim_colon_completions "$cur"
 }