On Tue, Oct 18, 2016 at 3:38 PM, Anton Khirnov <an...@khirnov.net> wrote:
> Quoting Vittorio Giovara (2016-10-14 00:23:08)
>> This is needed for improved fate testing and it is modeled after
>> -show_format_entry. The main behavioral difference is that when a print
>> function is called with an empty key, rather than discarding it, the
>> closes key in the hierarchy is used instead.
> And why the difference?

because the display matrix is printed as an array, so it uses
probe_int(NULL, ...) within a "matrix" block

without this change `-show_stream_entry matrix` would not report
anything, since the key used in the dictionary was NULL
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