Hi Devs,
I got a crash log which shows that the access violation is happening in the
following location:
*mapserver!yylex+0x1b5
[e:\builds-t1\src\mapserver-intramaps\vc15x64\mapparser.y @ 858]
mapserver!yyparse+0x247
[e:\home\even\mapserver\mapserver\mapparser.c @ 1461]
mapserver!msEvalContext+0x178
[e:\builds-t1\src\mapserver-intramaps\maputil.c @ 442]
mapserver!msDrawVectorLayer+0xb0
[e:\builds-t1\src\mapserver-intramaps\mapdraw.c @ 918]
mapserver!msDrawLayer+0x3a3
[e:\builds-t1\src\mapserver-intramaps\mapdraw.c @ 813]
mapserver!msDrawMap+0x415
[e:\builds-t1\src\mapserver-intramaps\mapdraw.c @ 403]
mapscript!CSharp_mapObj_draw+0xd*
By looking into the corresponding code, the problem has happened in the
following location in yylex():
* case MS_TOKEN_BINDING_INTEGER: token = NUMBER; ---->
(*lvalp).dblval =
atof(p->shape->values[p->expr->curtoken->tokenval.bindval.index]);
break;*
In maputil.c the call stack location is here (msEvalContext):
*msTokenizeExpression(&e, NULL, NULL); p.shape = NULL; p.expr = &e;
p.expr->curtoken = p.expr->tokens; /* reset */ p.type =
MS_PARSE_TYPE_BOOLEAN;-----> status = yyparse(&p);
msFreeExpression(&e);*
And in mapdraw.c
* /* TODO TBT: draw as raster layer in vector renderers */----->
annotate = msEvalContext(map, layer, layer->labelrequires);
if(map->scaledenom > 0) { if((layer->labelmaxscaledenom != -1) &&
(map->scaledenom >= layer->labelmaxscaledenom)) annotate = MS_FALSE;
if((layer->labelminscaledenom != -1) && (map->scaledenom <
layer->labelminscaledenom)) annotate = MS_FALSE; }*
I'm not sure if the LABELREQUIRES option supports attribute binding
(probably not) and in that case the
p->expr->curtoken->tokenval.bindval.index would probably have undefined
value. I don't have any information about the corresponding LABELREQUIRES
expression , but if I assume it doesn't contain attribute binding, then
this crash might probably happen due to a missing parser lock around
*yyparse(&p).
*What do you think about the problem and how could we work around this?
Thanks,
Tamas
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