This is METAFONT, WAITS Version -90.0 (INIMF)  5 APR 1984 22:07
**ptest
(PTEST.MF[MF,DEK]
{tracingedges:=1}
{tracingtitles:=1}
{tracingequations:=1}
{tracingspecs:=2}
{tracingpens:=1}
{tracingchoices:=1}
{tracingstats:=2}
{tracingonline:=1}

{tracingoutput:=1}
{tracingmacros:=3}
{edges}
{-(20)}
{nulledges}
{(unknown edges e[-20])=(edges)}
{addto}
{-(20)}
Path at line 9, before choices:
(0,0){curl 1}
 ..(10,20)
 ..(0,30){curl 1}

Path at line 9, after choices:
(0,0)..controls (8.15883,2.9046) and (12.57162,11.73018)
 ..(10,20)..controls (8.51497,24.77559) and (4.77559,28.51497)
 ..(0,30)

Path at line 9, before choices:
(0,0)..controls (8.15883,2.9046) and (12.57162,11.73018)
 ..(10,20)..controls (8.51497,24.77559) and (4.77559,28.51497)
 ..(0,30)..tension 3
 ..cycle

Path at line 9, after choices:
(0,0)..controls (8.15883,2.9046) and (12.57162,11.73018)
 ..(10,20)..controls (8.51497,24.77559) and (4.77559,28.51497)
 ..(0,30)..controls (-9.44661,32.93755) and (-9.04688,-3.22075)
 ..cycle

Path at line 9, before subdivision into octants:
(0,0)..controls (8.15883,2.9046) and (12.57162,11.73018)
 ..(10,20)..controls (8.51497,24.77559) and (4.77559,28.51497)
 ..(0,30)..controls (-9.44661,32.93755) and (-9.04688,-3.22075)
 ..cycle

Cycle spec at line 9, after subdivision:
(-1.11182,-0.20328) % beginning in the first octant
   ..controls (-0.75705,-0.20328) and (-0.38641,-0.13756)
 ..(0,0) % segment 3
   ..controls (2.32857,0.82898) and (4.35199,2.14026)
 ..(5.995,3.78326) % segment 1
% entering the second octant
   ..controls (8.9994,6.78767) and (10.73177,10.90129)
 ..(10.73177,15.20349) % segment 1
% entering the third octant
   ..controls (10.73177,16.79207) and (10.49557,18.40636)
 ..(10,20) % segment 1
   ..controls (9.25748,22.3878) and (7.95137,24.51654)
 ..(6.23395,26.23396) % segment 2
% entering the fourth octant
   ..controls (4.51653,27.95139) and (2.38779,29.25749)
 ..(0,30) % segment 2
   ..controls (-0.3694,30.11487) and (-0.72374,30.16995)
 ..(-1.0631,30.16995) % segment 3
% entering the fifth octant
   ..controls (-1.96658,30.16995) and (-2.76387,29.77946)
 ..(-3.4563,29.08704) % segment 3
% entering the sixth octant
   ..controls (-5.79333,26.75) and (-6.93587,20.97334)
 ..(-6.93587,15.16183) % segment 3
% entering the seventh octant
   ..controls (-6.93587,9.1933) and (-5.73079,3.18802)
 ..(-3.37697,0.8342) % segment 3
% entering the eighth octant
   ..controls (-2.71292,0.17015) and (-1.95744,-0.20328)
 ..(-1.11182,-0.20328) % segment 3
% entering the first octant
 & cycle

Tracing edges at line 9: (weight 1)
(1,0)(1,1)(3,1)(3,2)(5,2)(5,3)(6,3)(6,4)(7,4)(7,6)(8,6)(8,7)(9,7)(9,9)
(10,9)(10,12)(11,12)(11,18)(10,18)(10,21)(9,21)(9,23)(8,23)(8,25)(7,25)
(7,26)(6,26)(6,27)(5,27)(5,28)(3,28)(3,29)(1,29)(1,30)(-3,30)(-3,29)
(-4,29)(-4,28)(-5,28)(-5,25)(-6,25)(-6,21)(-7,21)(-7,9)(-6,9)(-6,5)
(-5,5)(-5,2)(-4,2)(-4,1)(-3,1)(-3,0).

{shipout}
{-(20)}
Edge structure at line 10 (just shipped out):
row 29: | -3+ 1-
row 28: | -4+ 3-
row 27: | -5+ 5-
row 26: | -5+ 6-
row 25: | -5+ 7-
row 24: | -6+ 8-
row 23: | -6+ 8-
row 22: | -6+ 9-
row 21: | -6+ 9-
row 20: | -7+ 10-
row 19: | -7+ 10-
row 18: | -7+ 10-
row 17: | -7+ 11-
row 16: | -7+ 11-
row 15: | -7+ 11-
row 14: | -7+ 11-
row 13: | -7+ 11-
row 12: | -7+ 11-
row 11: | -7+ 10-
row 10: | -7+ 10-
row 9: | -7+ 10-
row 8: | -6+ 9-
row 7: | -6+ 9-
row 6: | -6+ 8-
row 5: | -6+ 7-
row 4: | -5+ 7-
row 3: | -5+ 6-
row 2: | -5+ 5-
row 1: | -4+ 3-
row 0: | -3+ 1-

{openwindow}
{-(250)}
Calling INITSC:false
{display}
{-(20)}
{openwindow}
{display}
{-(20)}

stop
! Isolated expression.
l.15 stop;
          
? 
 
Here is how much of METAFONT's memory you used:
 3 strings out of 668
 30 string characters out of 15641
 253&100 words of memory out of 13000&17001
 184 symbolic tokens out of 2100
 1i,0p,81b stack positions out of 30i,30p,500b
Output written on PTEST.GF[MF,DEK] (1 character, 176 bytes).