Comment 3 for bug 883202

On 28 October 2011 22:23, Garth Wells <email address hidden> wrote:
> 2011/10/28 Kristian B. Ølgaard <email address hidden>:
>> On 28 October 2011 19:37, Launchpad Bug Tracker
>> <email address hidden> wrote:
>>> Garth Wells (garth-wells) has assigned this bug to you for FFC:
>>>
>>> The below code fails to run due to undeclared variables:
>>>
>>> from dolfin import *
>>> # Below line causes failure
>>> parameters["form_compiler"]["optimize"]       = True
>>> parameters["form_compiler"]["representation"] = "quadrature"
>>> mesh = UnitSquare(2, 2)
>>> P1 = VectorFunctionSpace(mesh, "Lagrange", 2)
>>> B  = VectorFunctionSpace(mesh, "Bubble", 3)
>>> Mini = (P1 + B)
>>
>> I don't understand where the form is coming from (the error is in a
>> tabulate_tensor() function).
>> What does adding two function spaces mean?
>>
>
> It's an 'enriched' space. The code is a cut-down version of the
> stokes-mini demo.

Sure, I just don't understand why:

Mini = (P1 + B)

results in a form.

It should just be an element, and if the code read (in a UFL file):

element = (P1 + B)

FFC would generate a header for one element without the
tabulate_tensor() function.

Kristian

> Garth
>
>>
>>>
>>> The Instant output is:
>>>
>>>
>>> In file included from instant_module_c57922f6eccdd3bfa89632e935c27d66b0c22e0b_wrap.cxx:3085:0:
>>> ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h: In member function ‘virtual void ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9_cell_integral_0_0::tabulate_tensor(double*, const double* const*, const ufc::cell&) const’:
>>> ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h:1231:9: error: ‘nzc0’ was not declared in this scope
>>> ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h:1231:14: error: ‘j’ was not declared in this scope
>>> error: command 'gcc' failed with exit status 1
>>>
>>> ** Affects: ffc
>>>     Importance: Critical
>>>     Assignee: Kristian B. Ølgaard (k.b.oelgaard)
>>>         Status: Confirmed
>>>
>>> --
>>> Undeclared variables in optimised quadrature code
>>> https://bugs.launchpad.net/bugs/883202
>>> You received this bug notification because you are a bug assignee.
>>>
>>
>> --
>> You received this bug notification because you are a member of FFC Core
>> Team, which is subscribed to FFC.
>> https://bugs.launchpad.net/bugs/883202
>>
>> Title:
>>  Undeclared variables in optimised quadrature code
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/ffc/+bug/883202/+subscriptions
>>
>
> --
> You received this bug notification because you are a member of FFC Core
> Team, which is subscribed to FFC.
> https://bugs.launchpad.net/bugs/883202
>
> Title:
>  Undeclared variables in optimised quadrature code
>
> Status in FEniCS Form Compiler:
>  Confirmed
>
> Bug description:
>  The below code fails to run due to undeclared variables:
>
>  from dolfin import *
>  # Below line causes failure
>  parameters["form_compiler"]["optimize"]       = True
>  parameters["form_compiler"]["representation"] = "quadrature"
>  mesh = UnitSquare(2, 2)
>  P1 = VectorFunctionSpace(mesh, "Lagrange", 2)
>  B  = VectorFunctionSpace(mesh, "Bubble", 3)
>  Mini = (P1 + B)
>
>
>  The Instant output is:
>
>
>  In file included from instant_module_c57922f6eccdd3bfa89632e935c27d66b0c22e0b_wrap.cxx:3085:0:
>  ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h: In member function ‘virtual void ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9_cell_integral_0_0::tabulate_tensor(double*, const double* const*, const ufc::cell&) const’:
>  ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h:1231:9: error: ‘nzc0’ was not declared in this scope
>  ffc_form_5ca75cda2f9ef647eacfccf50055f2967e691cf9.h:1231:14: error: ‘j’ was not declared in this scope
>  error: command 'gcc' failed with exit status 1
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ffc/+bug/883202/+subscriptions
>