I wrote a program to get the max-infomation block from html file:
$ cat t.pike
void main(){
string get_main_str2(string data)/*{{{*/
{
array a=Parser.SGML.SGML()->feed(data)->finish();
string max_str="";
int max_count=0;
int count(string s)
{
multiset m=(<>);
foreach(s;int i;int c){
m[c]=1;
}
return sizeof(m);
};
//int n;
//int key_n=17473;
void walk(array a,void|int found_body)
{
//write("walk step %d\n",n++);
foreach(a,object|string ob){
if(stringp(ob)){
int n=count(ob);
//werror("count=%d\n",n);
if(n>max_count&&found_body){
//werror("update max_str=%s\n",ob);
max_str=ob;
max_count=n;
}
}else{
if(lower_case(ob->name)=="body"){
//werror("found body\n");
found_body=1;
}else{
//ASSERT(ob->name!="body");
}
if(lower_case(ob->name)!="style"){
walk(ob->data,found_body);
}
}
}
};
walk(a);
if(max_str=="")
walk(a,1);
return max_str;
};/*}}}*/
write("%s\n",get_main_str2(Stdio.read_file("debug.txt")));
}
Using the attached debug.txt (in the debug.zip, unzip it please) as input, the
program crashed, and a simple one-line error said: Segmentation fault, no
call-stack dump at all.
$ pike t.pike
Segmentation fault
So I don't know what happened, I insert the debug codes into the source. When
the following lines added, call-stack dumped.
int n;
int key_n=17473;
$ pike t.pike
t.pike:17: Warning: Unused local variable n.
C stack overflow.
/home/peterpan/pike/7.8.116/lib/modules/Parser.pmod/SGML.pike:84:
Parser.SGML()->SGML()->SGMLatom()->_sprintf(79,mapping[1])
.... last 1 frames above repeated 918 times ...
/home/peterpan/pike/7.8.116/lib/master.pike:4153:
master()->Describer()->describe(Parser.SGML()->SGML()->SGMLatom(),198)
/home/peterpan/pike/7.8.116/lib/master.pike:4185:
master()->Describer()->describe_comma_list(({"\n",SGMLatom(<b>
"poner detra")," nachstellen",@0=Parser.SGML()->SGML()->SGMLatom()}),198)
/home/peterpan/pike/7.8.116/lib/master.pike:4098:
master()->Describer()->describe_array(@1=({"\n",SGMLatom(<b>
"poner detra")," nachstellen",@0}),200)
/home/peterpan/pike/7.8.116/lib/master.pike:4136:
master()->Describer()->describe(@1,200)
/home/peterpan/pike/7.8.116/lib/master.pike:4185:
master()->Describer()->describe_comma_list((),200)
/home/peterpan/pike/7.8.116/lib/master.pike:4683:
describe_backtrace(({backtrace_frame(/home/peterpan/pike/7.8.116/lib/master.pike:3835,
_main(), Args: 1),backtrace_frame(/home/peterpan/work-hadoop/t.pike:51, main(),
No args),,,11066}
),190)
/home/peterpan/pike/7.8.116/lib/master.pike:1972:
master()->handle_error(({"Svalue stack overflow. (99624 of 100000 entries on
stack, needed 256 more entries)\n",@2}))
C stack overflow.
/home/peterpan/pike/7.8.116/lib/modules/Parser.pmod/SGML.pike:84:
Parser.SGML()->SGML()->SGMLatom()->_sprintf(79,mapping[1])
.... last 1 frames above repeated 918 times ...
/home/peterpan/pike/7.8.116/lib/master.pike:4153:
master()->Describer()->describe(Parser.SGML()->SGML()->SGMLatom(),198)
/home/peterpan/pike/7.8.116/lib/master.pike:4185:
master()->Describer()->describe_comma_list(({"\n",SGMLatom(<b>
"poner detra")," nachstellen",@0=Parser.SGML()->SGML()->SGMLatom()}),198)
/home/peterpan/pike/7.8.116/lib/master.pike:4098:
master()->Describer()->describe_array(@1=({"\n",SGMLatom(<b>
"poner detra")," nachstellen",@0}),200)
/home/peterpan/pike/7.8.116/lib/master.pike:4136:
master()->Describer()->describe(@1,200)
/home/peterpan/pike/7.8.116/lib/master.pike:4185:
master()->Describer()->describe_comma_list((),200)
/home/peterpan/pike/7.8.116/lib/master.pike:4683:
describe_backtrace(({backtrace_frame(/home/peterpan/pike/7.8.116/lib/master.pike:3835,
_main(), Args: 1),backtrace_frame(/home/peterpan/work-hadoop/t.pike:51, main(),
No args),,,11066}
),190)
/home/peterpan/pike/7.8.116/lib/master.pike:1972:
master()->handle_error(({"Svalue stack overflow. (99624 of 100000 entries on
stack, needed 256 more entries)\n",@2}))
It's strange
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