FFC compilation error with product spaces

[Nico Schlömer]

The script

mesh = UnitCube(2, 2, 2)
PN = FunctionSpace(mesh, "Nedelec 2nd kind H(curl)", 1)
W = PN * PN
v = TestFunction(W)
c = Function(W)
L = inner(c, v)*dx
b = assemble(L)

fails with the error message

gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include -I/usr/include -I/usr/include/python2.7 -c b8523121f3acacf0a6d1b63598de33ea893b135d_wrap.cxx -o build/temp.linux-x86_64-2.7/b8523121f3acacf0a6d1b63598de33ea893b135d_wrap.o -O0
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
In file included from b8523121f3acacf0a6d1b63598de33ea893b135d_wrap.cxx:3098:0:
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h: In member function ‘virtual void ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d_cell_integral_0_0::tabulate_tensor(double*, const double* const*, const ufc::cell&) const’:
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:80: error: ‘K_03’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:85: error: ‘K_13’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:92: error: ‘K_04’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:97: error: ‘K_14’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:104: error: ‘K_05’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3878:109: error: ‘K_15’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3879:85: error: ‘K_23’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3879:97: error: ‘K_24’ was not declared in this scope
ffc_form_b8523121f3acacf0a6d1b63598de33ea893b135d.h:3879:109: error: ‘K_25’ was not declared in this scope
error: command 'gcc' failed with exit status 1

[Garth Wells (garth-wells)]

This is an FFC bug (not a DOLFIN bug).