Convey frame name as is, even if empty.

src/vm/moar/QAST/QASTCompilerMAST.nqp

@@ -618,7 +618,7 @@ class QAST::MASTCompiler {
 
             # Create an empty frame and add it to the compilation unit.
             my $frame := MAST::Frame.new(
-                :name($node.name || self.unique('frame_name_')),
+                :name($node.name),
                 :cuuid($cuid));
 
             $*MAST_COMPUNIT.add_frame($frame);