Another integration question



I stumbled across a definite integral that seems to make Maxima
hang. Has anyone seen this before?

-8<------------
(%i1) integrate( (x^3+1)/(x^4 + 4*x + 1), x);
				    4
			       log(x  + 4 x + 1)
(%o1) 			       -----------------
				       4
(%i2) integrate( (x^3+1)/(x^4 + 4*x + 1), x, 0, 1);

[... no output, sblc cpu usage at 87%  ...]

---------------

I have to interrupt to get back to the prompt.

Max

Maxima 5.11.0
SBCL 1.0.3