I'm trying to do a GST_QUERY_URI on a filesink using gst_element_query(), but the query is never handled and fails. (It's actually on a bin containing a filesink, but I don't think that matters).
GstBaseSink's default_element_query() handles the query, and defaults to doing gst_pad_peer_query(). This sends the query upstream through the muxer, parser, etc., but the filesink itself never gets to answer.
filesink implements GstBaseSink::query() and handles GST_QUERY_URI there, but it looks like basesink only calls that for a pad query, not element query.

I can query the bin's sink pad instead, but gst_element_query(filesink, GST_QUERY_URI) seems like something that should work. Is this the case?

Relevant debug lines:
GST_ELEMENT_PADS gstelement.c:1707:gst_element_query: send query on element tdstream0
bin gstbin.c:4376:gst_bin_query:<tdstream0> Sending query 0x29c6c0 (type uri) to sink children
GST_ELEMENT_PADS gstelement.c:1707:gst_element_query: send query on element filesink
GST_PADS gstpad.c:4059:gst_pad_peer_query:<filesink:sink> peer query 0x29c6c0 (uri)
GST_PADS gstpad.c:3932:gst_pad_query:<muxer:src> doing query 0x29c6c0 (uri)
GST_PADS gstpad.c:3376:gst_pad_query_default:<muxer:src> forwarding 0x29c6c0 (uri) query
GST_PADS gstpad.c:2836:gst_pad_iterate_internal_links_default:<muxer:src> Making iterator
GST_PADS gstpad.c:4059:gst_pad_peer_query:<muxer:video_0> peer query 0x29c6c0 (uri)
GST_PADS gstpad.c:3932:gst_pad_query:<parser:src> doing query 0x29c6c0 (uri)
GST_PADS gstpad.c:3376:gst_pad_query_default:<parser:src> forwarding 0x29c6c0 (uri) query
GST_PADS gstpad.c:2836:gst_pad_iterate_internal_links_default:<parser:src> Making iterator
GST_PADS gstpad.c:4059:gst_pad_peer_query:<parser:sink> peer query 0x29c6c0 (uri)
... queries all the way to the src