This is METAFONT, WAITS Version -56.0 (preloaded base=plain 84.6.6)  6 JUN 1984 23:37
**test
(TEST.MF[MF,DEK]
{tracingedges:=1}
{tracingtitles:=1}
{tracingequations:=1}
{tracingspecs:=1}
{tracingpens:=1}
{tracingchoices:=1}
{tracingstats:=2}
{tracingonline:=1}

{tracingoutput:=1}
{tracingmacros:=3}
{xyzzy:=1}

draw<expression>->addto.currentpicture.doublepath(EXPR0)withpen.defaultpen
Path at line 4, before choices:
(0,0)..controls (13.33717,33.34294) and (26.67436,66.6859)
 ..(40.01154,100.02884)

Path at line 4, after choices:
(0,0)..controls (13.33717,33.34294) and (26.67436,66.6859)
 ..(40.01154,100.02884)

(EXPR0)<-path
{addto}
Path at line 4, before subdivision into octants:
(0,0)..controls (13.33717,33.34294) and (26.67436,66.6859)
 ..(40.01154,100.02884)..controls (26.67436,66.6859) and (13.33717,33.34294)
 ..cycle

Cycle spec at line 4, after subdivision:
(0,0) % beginning in the second octant
   ..controls (13.33717,33.34294) and (26.67436,66.6859)
 ..(40.01154,100.02884) % segment 0
% entering the third octant
% entering the fourth octant
% entering the fifth octant
% entering the sixth octant
   ..controls (26.67436,66.6859) and (13.33717,33.34294)
 ..(0,0) % segment 1
% entering the seventh octant
% entering the eighth octant
% entering the first octant
 & cycle

Tracing edges at line 4: (weight 1)
@ Octant 2 (0 offsets), from (0.5,0) to (40.51154,100.02884)
@@ with autorounding: from (0.5,0) to (40.51154,100.02884)
@ transition line 1, from (40.51154,100.02884) to (40.51154,100.02884)
(1,0)(1,3)(2,3)(2,5)(3,5)(3,8)(4,8)(4,10)(5,10)(5,13)(6,13)(6,15)(7,15)
(7,18)(8,18)(8,20)(9,20)(9,23)(10,23)(10,25)(11,25)(11,28)(12,28)(12,30)
(13,30)(13,33)(14,33)(14,35)(15,35)(15,38)(16,38)(16,40)(17,40)(17,43)
(18,43)(18,45)(19,45)(19,48)(20,48)(20,50)(21,50)(21,53)(22,53)(22,55)
(23,55)(23,58)(24,58)(24,60)(25,60)(25,63)(26,63)(26,65)(27,65)(27,68)
(28,68)(28,70)(29,70)(29,73)(30,73)(30,75)(31,75)(31,78)(32,78)(32,80)
(33,80)(33,83)(34,83)(34,85)(35,85)(35,88)(36,88)(36,90)(37,90)(37,93)
(38,93)(38,95)(39,95)(39,98)(40,98)
@ Octant 3 (0 offsets), from (40.51154,100.02884) to (40.51154,100.02884)
@ transition line 0, from (40.51154,100.02884) to (40.51154,100.02884)
@ Octant 4 (1 offset), from (40.51154,100.02884) to (40.01154,100.52884)
@ transition line 2, from (40.51154,100.02884) to (40.01154,100.52884)
@ transition line 1, from (40.01154,100.52884) to (40.01154,100.52884)
@ Octant 5 (1 offset), from (40.01154,100.52884) to (39.51154,100.02884)
@ transition line 0, from (40.01154,100.52884) to (40.01154,100.52884)
@ transition line 1, from (40.01154,100.52884) to (39.51154,100.02884)
(40,101)
@ Octant 6 (0 offsets), from (39.51154,100.02884) to (-0.5,0)
@@ with autorounding: from (39.51154,100.02884) to (-0.5,0)
@ transition line 1, from (-0.5,0) to (-0.5,0)
(40,100)(39,100)(39,98)(38,98)(38,95)(37,95)(37,93)(36,93)(36,90)(35,90)
(35,88)(34,88)(34,85)(33,85)(33,83)(32,83)(32,80)(31,80)(31,78)(30,78)
(30,75)(29,75)(29,73)(28,73)(28,70)(27,70)(27,68)(26,68)(26,65)(25,65)
(25,63)(24,63)(24,60)(23,60)(23,58)(22,58)(22,55)(21,55)(21,53)(20,53)
(20,50)(19,50)(19,48)(18,48)(18,45)(17,45)(17,43)(16,43)(16,40)(15,40)
(15,38)(14,38)(14,35)(13,35)(13,33)(12,33)(12,30)(11,30)(11,28)(10,28)
(10,25)(9,25)(9,23)(8,23)(8,20)(7,20)(7,18)(6,18)(6,15)(5,15)(5,13)
(4,13)(4,10)(3,10)(3,8)(2,8)(2,5)(1,5)(1,3)(0,3)
@ Octant 7 (0 offsets), from (-0.5,0) to (-0.5,0)
@ transition line 0, from (-0.5,0) to (-0.5,0)
@ Octant 8 (1 offset), from (-0.5,0) to (0,-0.5)
@ transition line 2, from (-0.5,0) to (0,-0.5)
@ transition line 1, from (0,-0.5) to (0,-0.5)
@ Octant 1 (1 offset), from (0,-0.5) to (0.5,0)
@ transition line 0, from (0,-0.5) to (0,-0.5)
@ transition line 1, from (0,-0.5) to (0.5,0)
(0,0).

{showall}
>> 
Edge structure at line 5:
row 100: 40+ 40- |
row 99: 39+ 40- |
row 98: 39+ 40- |
row 97: 38+ 39- |
row 96: 38+ 39- |
row 95: 38+ 39- |
row 94: 37+ 38- |
row 93: 37+ 38- |
row 92: 36+ 37- |
row 91: 36+ 37- |
row 90: 36+ 37- |
row 89: 35+ 36- |
row 88: 35+ 36- |
row 87: 34+ 35- |
row 86: 34+ 35- |
row 85: 34+ 35- |
row 84: 33+ 34- |
row 83: 33+ 34- |
row 82: 32+ 33- |
row 81: 32+ 33- |
row 80: 32+ 33- |
row 79: 31+ 32- |
row 78: 31+ 32- |
row 77: 30+ 31- |
row 76: 30+ 31- |
row 75: 30+ 31- |
row 74: 29+ 30- |
row 73: 29+ 30- |
row 72: 28+ 29- |
row 71: 28+ 29- |
row 70: 28+ 29- |
row 69: 27+ 28- |
row 68: 27+ 28- |
row 67: 26+ 27- |
row 66: 26+ 27- |
row 65: 26+ 27- |
row 64: 25+ 26- |
row 63: 25+ 26- |
row 62: 24+ 25- |
row 61: 24+ 25- |
row 60: 24+ 25- |
row 59: 23+ 24- |
row 58: 23+ 24- |
row 57: 22+ 23- |
row 56: 22+ 23- |
row 55: 22+ 23- |
row 54: 21+ 22- |
row 53: 21+ 22- |
row 52: 20+ 21- |
row 51: 20+ 21- |
row 50: 20+ 21- |
row 49: 19+ 20- |
row 48: 19+ 20- |
row 47: 18+ 19- |
row 46: 18+ 19- |
row 45: 18+ 19- |
row 44: 17+ 18- |
row 43: 17+ 18- |
row 42: 16+ 17- |
row 41: 16+ 17- |
row 40: 16+ 17- |
row 39: 15+ 16- |
row 38: 15+ 16- |
row 37: 14+ 15- |
row 36: 14+ 15- |
row 35: 14+ 15- |
row 34: 13+ 14- |
row 33: 13+ 14- |
row 32: 12+ 13- |
row 31: 12+ 13- |
row 30: 12+ 13- |
row 29: 11+ 12- |
row 28: 11+ 12- |
row 27: 10+ 11- |
row 26: 10+ 11- |
row 25: 10+ 11- |
row 24: 9+ 10- |
row 23: 9+ 10- |
row 22: 8+ 9- |
row 21: 8+ 9- |
row 20: 8+ 9- |
row 19: 7+ 8- |
row 18: 7+ 8- |
row 17: 6+ 7- |
row 16: 6+ 7- |
row 15: 6+ 7- |
row 14: 5+ 6- |
row 13: 5+ 6- |
row 12: 4+ 5- |
row 11: 4+ 5- |
row 10: 4+ 5- |
row 9: 3+ 4- |
row 8: 3+ 4- |
row 7: 2+ 3- |
row 6: 2+ 3- |
row 5: 2+ 3- |
row 4: 1+ 2- |
row 3: 1+ 2- |
row 2: 0+ 1- |
row 1: 0+ 1- |
row 0: 0+ 1- |

! OK.
p.2,l.5 showall currentpicture;
                               
? x
 
Here is how much of METAFONT's memory you used:
 0 strings out of 489
 0 string characters out of 11642
 828&1282 words of memory out of 26000&34001
 287 symbolic tokens out of 2100
 2i,40n,1p,70b stack positions out of 30i,50n,150p,500b