I confirm that MJSON_ARRAYBUFFER does not work correctly for zero-size buffers, 
buffer is leaked in the destructor and copied as NULL in MJsonNode::Copy().

I also confirm memory leak in mjsonrpc "brpc" error path (already fixed).

Affected by the MJSON_ARRAYBUFFER memory leak are "brpc" (where user code returns 
a zero-size data buffer) and "js_read_binary_file" (if reading from an empty 
file, return of "new char[0]" is never freed).

"receive_event" and "read_history" RPCs never use zero-size buffers and are not 
affected by this bug.

mjson commit c798c1f0a835f6cea3e505a87bbb4a12b701196c
midas commit 576f2216ba2575b8857070ce7397210555f864e5
rootana commit a0d9bb4d8459f1528f0882bced9f2ab778580295

Please post bug reports a plain-text so I can quote from them.

K.O.