Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!keysec!gm
From: gm@keysec.kse.com (Greg McGary)
Newsgroups: comp.text
Subject: METAFONT Trap test fails on MIPS.  Help!
Keywords: METAFONT, MIPS
Message-ID: <1990Jan9.125234.3893@keysec.kse.com>
Date: 9 Jan 90 12:52:34 GMT
Reply-To: gm@keysec.kse.com (Greg McGary)
Distribution: na
Organization: Key Systems Engineering, Reston
Lines: 279

MF 1.7 from the UNIX-TeX distribution fails the trap test on a MIPS b.
I'll give a brief report here, and if some kind soul would like more of the
gory details, I'll give a complete report via mail.

The compiler version:
    cc -V reveals that all compiler comonents are:
	MIPS cmplrs 2.0 (from RISC/os 4.00)

    I compiled with `-signed -systype bsd43'.  By default the MIPS compiler does
    easy optimizations.  I forcibly turned all optimizations off with `-O0' but
    it made no difference.

The first (`trapin') phase completed successfully.

The second (`trap') phase bombed.
A summary of the most disturbing things I noticed in my trap run were
the following:

    ! Too far to shift.
    (There's unbounded black in character shipped out!)
    ! METAFONT capacity exceeded, sorry [main memory size=3001].

The `capacity exceeded' condition occurred only about 10% into the run.

Thanks in advance for your assistance.

-- Greg McGary
-- Key Systems Engineering
-- Work: (703) 742-7870  Home: (703) 352-0407
-- gm@kse.com, gm@cs.duke.edu, ..!uunet!keysec!gm

Here's the (abbreviated) context diff:

*** SAVEtrap.log	Tue Jan  9 05:50:03 1990
--- trap.log	Tue Jan  9 06:55:38 1990
***************
*** 1584,1593 ****
  {(picture)shifted((-4095,4092))}
  {-(3)}
  {(picture)shifted((-3,0))}
  >> Edge structure at line 75:
! row 4094: -4094+ -4093- -4094+ -4093- |
! row 4093: -4094+ -4093- -4094+ -4093- |
! row 4092: -4095+ -4092- -4093+ -4094- |
  
  {-(4095)}
  {(picture)shifted((4089,-4095))}
--- 1584,1602 ----
  {(picture)shifted((-4095,4092))}
  {-(3)}
  {(picture)shifted((-3,0))}
+ ! Too far to shift.
+ <to be read again> 
+                    ,
+ l.75 ...95,4092) shifted (-3,0),
+                                 
+ I can't shift the picture as requested---it would
+ make some coordinates too large or too small.
+ Proceed, and I'll omit the transformation.
+ 
  >> Edge structure at line 75:
! row 4094: -4091+ -4090- -4091+ -4090- |
! row 4093: -4091+ -4090- -4091+ -4090- |
! row 4092: -4092+ -4089- -4090+ -4091- |
  
  {-(4095)}
  {(picture)shifted((4089,-4095))}
***************
*** 1767,1782 ****
  @ transition line 0, from (4095.49998,1) to (4095.49998,1)
  @ transition line 1, from (4095.49998,1) to (-4095.49998,0)
  @ transition line 2, from (-4095.49998,0) to (-4095.49998,0)
! (4095,1)(0,1)
  @ Octant SSW (1 offset), from (-4095.49998,0) to (-4095.49998,-1)
  @ transition line 2, from (-4095.49998,0) to (-4095.49998,0)
  @ transition line 1, from (-4095.49998,0) to (-4095.49998,-1)
! (0,0)(-4095,0)
  @ Octant SSE (0 offsets), from (-4095.49998,-1) to (-4095.49998,-1)
  @ transition line 0, from (-4095.49998,-1) to (-4095.49998,-1)
  @ Octant ESE (0 offsets), from (-4095.49998,-1) to (-4095.49998,-1)
  @ transition line 1, from (-4095.49998,-1) to (-4095.49998,-1)
! (-4095,-1).
  
  {show}
  >> Edge structure at line 81:
--- 1776,1791 ----
  @ transition line 0, from (4095.49998,1) to (4095.49998,1)
  @ transition line 1, from (4095.49998,1) to (-4095.49998,0)
  @ transition line 2, from (-4095.49998,0) to (-4095.49998,0)
! ?(0,1)
  @ Octant SSW (1 offset), from (-4095.49998,0) to (-4095.49998,-1)
  @ transition line 2, from (-4095.49998,0) to (-4095.49998,0)
  @ transition line 1, from (-4095.49998,0) to (-4095.49998,-1)
! ?(-4095,1)
  @ Octant SSE (0 offsets), from (-4095.49998,-1) to (-4095.49998,-1)
  @ transition line 0, from (-4095.49998,-1) to (-4095.49998,-1)
  @ Octant ESE (0 offsets), from (-4095.49998,-1) to (-4095.49998,-1)
  @ transition line 1, from (-4095.49998,-1) to (-4095.49998,-1)
! (-4095,0).
  
  {show}
  >> Edge structure at line 81:
***************
*** 1801,1807 ****
  
  {showstats}
  Memory usage 1066&170 (765 still untouched)
! String usage 18&67 (1011&12034 still untouched)
  {addto}
  {(path)yscaled(0.01666)}
  Path at line 82, before subdivision into octants:
--- 1810,1816 ----
  
  {showstats}
  Memory usage 1066&170 (765 still untouched)
! String usage 18&67 (1011&12035 still untouched)
  {addto}
  {(path)yscaled(0.01666)}
  Path at line 82, before subdivision into octants:
***************
*** 1900,1906 ****
   & cycle
  
  Tracing edges at line 83: (weight 2)
! (2,0)(2,1)(4,1)(4,2)(4,1)(2,1)(2,0).
  
  {tracingspecs:=0}
  Path at line 84, before choices:
--- 1909,1915 ----
   & cycle
  
  Tracing edges at line 83: (weight 2)
! (2,0)(2,1)(4,1)(4,2)(3,2)(3,1)(1,1)(1,0).
  
  {tracingspecs:=0}
  Path at line 84, before choices:
***************
*** 1994,2000 ****
  @ transition line 1, from (999.1545,9.3455) to (999.1545,9.3455)
  @ Octant NNW (0 offsets), from (999.1545,9.3455) to (999,10.5)
  @ transition line 0, from (999.1545,9.3455) to (999.1545,9.3455)
! (1003,9)(999,9)(999,11).
  
  Tracing edges at line 86: (weight 1)
  @ Octant SSE (0 offsets), from (999,10.5) to (999.15451,9.34549)
--- 2003,2009 ----
  @ transition line 1, from (999.1545,9.3455) to (999.1545,9.3455)
  @ Octant NNW (0 offsets), from (999.1545,9.3455) to (999,10.5)
  @ transition line 0, from (999.1545,9.3455) to (999.1545,9.3455)
! (1003,9)(999,9)(999,10).
  
  Tracing edges at line 86: (weight 1)
  @ Octant SSE (0 offsets), from (999,10.5) to (999.15451,9.34549)
***************
*** 2009,2014 ****
--- 2018,2024 ----
  (999,9)(1003,9)
  @ Octant NNW (0 offsets), from (1003,10.5) to (1002.84549,11.65451)
  @ transition line 0, from (1003,10.5) to (1003,10.5)
+ !
  @ Octant WNW (0 offsets), from (1002.84549,11.65451) to (1001,12)
  @ transition line 1, from (1001,12) to (1001,12)
  @ Octant WSW (0 offsets), from (1001,12) to (999.1545,11.6545)
***************
*** 2031,2049 ****
  (999,11)
  @ Octant ESE (0 offsets), from (1001,12) to (1002.61804,11.42705)
  @ transition line 1, from (1002.61804,11.42705) to (1002.61804,11.42705)
! (999,12)(1003,12)
  @ Octant SSE (0 offsets), from (1002.61804,11.42705) to (1003,10.5)
  @ transition line 0, from (1002.61804,11.42705) to (1002.61804,11.42705)
  @ Octant SSW (0 offsets), from (1003,10.5) to (1002.61803,9.57294)
  @ transition line 1, from (1002.61803,9.57294) to (1002.61803,9.57294)
  @ Octant WSW (0 offsets), from (1002.61803,9.57294) to (1001,9)
  @ transition line 0, from (1002.61803,9.57294) to (1002.61803,9.57294)
  @ Octant WNW (0 offsets), from (1001,9) to (999.38196,9.57295)
  @ transition line 1, from (999.38196,9.57295) to (999.38196,9.57295)
! (1003,9)(999,9)
  @ Octant NNW (0 offsets), from (999.38196,9.57295) to (999,10.5)
  @ transition line 0, from (999.38196,9.57295) to (999.38196,9.57295)
! (999,11).
  
  {restoring autorounding=2}
  {endgroup}
--- 2041,2061 ----
  (999,11)
  @ Octant ESE (0 offsets), from (1001,12) to (1002.61804,11.42705)
  @ transition line 1, from (1002.61804,11.42705) to (1002.61804,11.42705)
! ?(1002,12)
  @ Octant SSE (0 offsets), from (1002.61804,11.42705) to (1003,10.5)
  @ transition line 0, from (1002.61804,11.42705) to (1002.61804,11.42705)
  @ Octant SSW (0 offsets), from (1003,10.5) to (1002.61803,9.57294)
  @ transition line 1, from (1002.61803,9.57294) to (1002.61803,9.57294)
+ ?(1003,12)
  @ Octant WSW (0 offsets), from (1002.61803,9.57294) to (1001,9)
  @ transition line 0, from (1002.61803,9.57294) to (1002.61803,9.57294)
+ !(1003,11)
  @ Octant WNW (0 offsets), from (1001,9) to (999.38196,9.57295)
  @ transition line 1, from (999.38196,9.57295) to (999.38196,9.57295)
! ?(999,10)
  @ Octant NNW (0 offsets), from (999.38196,9.57295) to (999,10.5)
  @ transition line 0, from (999.38196,9.57295) to (999.38196,9.57295)
! (999,10).
  
  {restoring autorounding=2}
  {endgroup}
***************
*** 2059,2071 ****
  {(6)*(-1)}
  {(picture)shifted((0,-6))}
  {(picture)+(picture)}
! [5.-14]
  Edge structure at line 88 (just shipped out):
! row 11: | 998- 998+ 998++ 1002-- 1002- 1002+
! row 10: | 998- 998+ 998++ 1002-- 1002- 1002+
  row 9: | 998- 998+ 998++ 1002-- 1002- 1002+
! row 5: | 998- 998+ 998++ 1002-- 1002- 1002+
! row 4: | 998- 998+ 998++ 1002-- 1002- 1002+
  row 3: | 998- 998+ 998++ 1002-- 1002- 1002+
  row 2: | 3+ 3+ 3+ 3+ 4- 4- 4- 4-
  row 1: | -1+ -1+ 0- 0- 1+ 2- 3+ 3+ 3+ 3+ 4- 4- 4- 4-
--- 2071,2085 ----
  {(6)*(-1)}
  {(picture)shifted((0,-6))}
  {(picture)+(picture)}
! [5.-14
! (There's unbounded black in character shipped out!)
! (There's unbounded black in character shipped out!)]
  Edge structure at line 88 (just shipped out):
! row 11: | 998- 998+ 998++ 1001-- 1002- 1002+
! row 10: | 998+ 1002-- 1002- 1002- 1002+
  row 9: | 998- 998+ 998++ 1002-- 1002- 1002+
! row 5: | 998- 998+ 998++ 1001-- 1002- 1002+
! row 4: | 998+ 1002-- 1002- 1002- 1002+
  row 3: | 998- 998+ 998++ 1002-- 1002- 1002+
  row 2: | 3+ 3+ 3+ 3+ 4- 4- 4- 4-
  row 1: | -1+ -1+ 0- 0- 1+ 2- 3+ 3+ 3+ 3+ 4- 4- 4- 4-
***************
*** 2116,4162 ****
   ..(0,2)
  
  Tracing edges at line 91: (weight 1)
! (-3071,0)(-3071,1)(-1024,1)(-1024,2)(-1024,1)(-3071,1)(-3071,0).
  
  {show}
  {-(90)}
  {(picture)rotated(-90)}
! >> Edge structure at line 91:
  
! <... about 2000 lines of stuff that only appears in SAVEtrap.log ...>
--- 2130,2151 ----
   ..(0,2)
  
  Tracing edges at line 91: (weight 1)
! (-3071,0)(-3071,1)(-1024,1)(-1024,2)(-1024,1)(-3072,1)(-3072,0).
  
  {show}
  {-(90)}
  {(picture)rotated(-90)}
! ! METAFONT capacity exceeded, sorry [main memory size=3001].
! l.91 ...,2); show e3 rotated-90,
!                                  (e0+e0) rotated90$ rotated90;
! If you really absolutely need more capacity,
! you can ask a wizard to enlarge me.
  
!  
! Here is how much of METAFONT's memory you used:
!  20 strings out of 1029
!  71 string characters out of 12088
!  3001 words of memory out of 3001
!  267 symbolic tokens out of 2100
!  4i,42n,8r,6p,105b stack positions out of 30i,100n,300r,150p,500b
! Output written on trap.72270gf (2 characters, 248 bytes).

-- 
-- Greg McGary
-- Key Systems Engineering
-- Work: (703) 742-7870  Home: (703) 352-0407
-- gm@kse.com, gm@cs.duke.edu, ..!uunet!keysec!gm