While attempting to debug the compiler on: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40092
I'm having great difficulty understanding the output of debug_c_tree or debug_tree because the child tree's are not shown. The ddd debugger: http://www.gnu.org/software/ddd/ is some help; however, even there it's unclear what the tree looks like because the tree is some sort of variant and ddd apparently doesn't know how to interpret the variant's tag. Instead, I have to trial and error what the variant is and mostly miss the mark. Is there any such debug_tree function usable in gdb or ddd which will show the actual tree variant?
