frob - memory block freed with wrong call type

[ergodicbreak]

Hello, I get this output entering a command like "climb over" playing a TADS 3 game with frob:

I'm not sure if this is supposed to be like that or if something is wrong. I compiled frob (I thought successfully) a few days ago.

george@dunstan ~/work/tads3/mygame$ frob -v
FrobTADS 2.0
TADS 2 virtual machive v2.5.17
TADS 3 virtual machine v3.1.3 (mjr-T3)
FrobTADS copyright (C) 2009 Nikos Chantziaras.
TADS copyright (C) 2009 Michael J. Roberts.
FrobTADS comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of FrobTADS under certain terms and conditions.
See the file named COPYING for more information.

Standard commands like 'i', 'x me', etc. don't give the output in the screenshot. Any idea what's going on?

thanks, George