GtkTextView scrolling is broken
Since commit a7df2fe7 in master, a GtkTextView that is packed indirectly into a GtkScrolledWindow is missing its vertical scroll bar, or has a broken one. E.g. a text-view packed in a vbox packed in a scrolled window (test case attached).scroll.c
Packing directly in a scrolled window parent still works, because the code for updating the vadjustment uses the height of the GtkTextLayout, but packing indirectly breaks scrolling because the scrolled window uses gtk_widget_measure, and gtk_text_view_measure ignores the layout height. The simple fix is to use priv->height instead of priv->top_margin + priv->bottom_margin, and to queue a resize in changed_handler.
I can offer a patch, or whatever the current work-flow calls for.