Created attachment 879109 [details]
Elinks window for https://stackoverflow.com/questions/20994959/

The libhubbub debug prints make the use of some websites in elinks more
difficult, see screenshot.

More specifically, in treebuilder/treebuilder.c following code can be found
which I suppose to be the reason for the outputs. Probably there's a macro
NDEBUG missing in compilation:

/* A slightly nasty debugging hook, but very useful */
#ifdef NDEBUG
# define mode(x) \
                case x:
#else
# define mode(x) \
                case x: \
                        printf( #x "\n");
#endif

        while (err == HUBBUB_REPROCESS) {
                switch (treebuilder->context.mode) {
                mode(INITIAL)
                        err = handle_initial(treebuilder, token);
                        break;
                mode(BEFORE_HTML)
                        err = handle_before_html(treebuilder, token);
                        break;
[...]
                mode(IN_BODY)
                        err = handle_in_body(treebuilder, token);
                        break;
[...]