Trigsimp choking



*Hello

I don't know if this is the right place to report a bug...

wxMaxima 0.7.1
Maxima 5.10.0
Using Lisp GNU Common Lisp (GCL) GCL 2.6.7 (aka GCL)

I've done:
depends([r, phi], t)

And then, while doing manipulations I get:
(%i47) ratsimp(%);
(%o47) 
matrix([cos(phi)*('diff(r,t,1))-sin(phi)*('diff(phi,t,1))*r],[sin(phi)*('diff(r,t,1))+cos(phi)*('diff(phi,t,1))*r])=matrix([(-cos(phi)*sin(phi)^2-cos(phi)^3)*r^3+(sin(phi)+cos(phi))*r],[(-sin(phi)^3-cos(phi)^2*sin(phi))*r^3+(sin(phi)-cos(phi))*r])

(%i48) trigsimp(%);The argument to put must be a symbolic 
name:'diff(sin,t,1)#0: 
trigsimp(?_l=[matrix([cos(phi)*'diff(r,t,1)-sin(phi)*'diff(phi,t,1)*r],[sin(phi)*'diff(r,t,1)+cos(phi)*'diff(phi,...) 
-- an error.  Quitting.  To debug this try debugmode(true);

Thanks
Ismael
*