* [9fans] troff pic bug report -> acid debug -> no fix yet
@ 2011-03-08 1:49 Fernan Bolando
2011-03-08 14:55 ` erik quanstrom
0 siblings, 1 reply; 2+ messages in thread
From: Fernan Bolando @ 2011-03-08 1:49 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
Hi all
Here is a bug report for troffs pic preprocessor.
It crashes when the commands is in a square bracket and you loose
track of the labels
-----------> test file contents
pseudo@helios; cat test.p
.PS
define missing { [
O: box invis wid 2.5 ht 1;
circle diam 0.1 with .e at P1;
] }
missing with .c at 0,0
.PE
-------> crash report and acid
pseudo@helios; cat test.p | pic
.lf 1 -
pic: no such place as P1 near -:8
context is
circle diam 0.1 with .e at >>> P1; <<< with .c at 0,0
pic 44699: suicide: sys: trap: fault read addr=0x10 pc=0x89b9
pseudo@helios; acid 44699
/proc/44699/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: src(0x89b9)
/sys/src/cmd/pic/circgen.c:49
44 case WITH:
45 with = ap->a_val.i;
46 break;
47 case AT:
48 ppos = ap->a_val.o;
>49 curx = ppos->o_x;
50 cury = ppos->o_y;
51 at++;
52 break;
53 case INVIS:
54 battr |= INVIS;
acid:
^ permalink raw reply [flat|nested] 2+ messages in thread
* [9fans] troff pic bug report -> acid debug -> no fix yet
2011-03-08 1:49 [9fans] troff pic bug report -> acid debug -> no fix yet Fernan Bolando
@ 2011-03-08 14:55 ` erik quanstrom
0 siblings, 0 replies; 2+ messages in thread
From: erik quanstrom @ 2011-03-08 14:55 UTC (permalink / raw)
; diffy -c symtab.c
/n/dump/2011/0308/sys/src/cmd/pic/symtab.c:8,22 - symtab.c:8,26
YYSTYPE getvar(char *s) /* return value of variable s (usually pointer) */
{
struct symtab *p;
- static YYSTYPE bug;
+ static YYSTYPE bug, bugplace;
p = lookup(s);
if (p == NULL) {
- if (islower(s[0]))
+ if (islower(s[0])) {
ERROR "no such variable as %s", s WARNING;
- else
+ return(bug);
+ } else {
ERROR "no such place as %s", s WARNING;
- return(bug);
+ if(bugplace.o == NULL)
+ bugplace.o = makepos(0., 0.);
+ return(bugplace);
+ }
}
return(p->s_val);
}
- erik
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-03-08 1:49 [9fans] troff pic bug report -> acid debug -> no fix yet Fernan Bolando
2011-03-08 14:55 ` erik quanstrom
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