add UNREACHABLE_RETURN

Not every compilers understand that rb_raise does not return.  When a
function does not end with a return statement, such compilers can issue
warnings.  We would better tell them about reachabilities.

1 files changed, 2 insertions, 0 deletions

diff --git a/variable.c b/variable.c
index 362ccddc13..4d62361fd0 100644
--- a/variable.c
+++ b/variable.c
@@ -277,6 +277,7 @@ rb_path_to_class(VALUE pathname)
   undefined_class:
     rb_raise(rb_eArgError, "undefined class/module % "PRIsVALUE,
              rb_str_subseq(pathname, 0, p-path));
+    UNREACHABLE_RETURN(Qundef);
 }
 
 VALUE
@@ -3347,6 +3348,7 @@ rb_mod_remove_cvar(VALUE mod, VALUE name)
   not_defined:
     rb_name_err_raise("class variable %1$s not defined for %2$s",
                       mod, name);
+    UNREACHABLE_RETURN(Qundef);
 }
 
 VALUE