Subj : Spider Monkey - 200/11 works, x=200/11 core dumps
To   : netscape.public.mozilla.jseng
From : pookiebearbottom@yahoo.com (Sally)
Date : Mon Nov 10 2003 04:45 pm

I am using the following code.  When ever I use basic math like
"200/11" the script works.  When I try to assign a variable, like
"x=200/11" I get a core dump.  Here is the code, any info would be
helpful.  I am somewhat new to spidermonkey, but been using javascript
for years (in case you are wondering, I am calling it from C++ and
that is why I wrote the wrappers like this).

Thanks
-Sal

void *p=initJS();  /* set up sm MY JS_RTStruct */
char r[1000]; /* result string */
runJSScript(p,"11/2",r);/* works */
runJSScript(p,"x=11/2",r);/* core dumps */

typedef struct 
{
  JSContext *cx;
  JSObject *global;
  JSRuntime *rt;
} JS_RTStruct;


void *initJS()
{
  JS_RTStruct *ptr=(JS_RTStruct *)malloc(sizeof(JS_RTStruct));
  JSClass global_class=
  {
    "global",0,
    JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,
    JS_EnumerateStub,JS_ResolveStub,JS_ConvertStub,JS_FinalizeStub
  };

  ptr->rt = JS_NewRuntime(0x100000);
  ptr->cx = JS_NewContext(ptr->rt, 0x1000);
  ptr->global = JS_NewObject(ptr->cx, &global_class, NULL, NULL);
  JS_InitStandardClasses(ptr->cx, ptr->global);

  return ptr;
}

void runJSScript(void *p,char *script,char *result)
{
  JS_RTStruct *ptr=(JS_RTStruct *)p;
  jsval rval;
  JSString *str;
  int lineno=0;
  JSBool ok=JS_EvaluateScript(ptr->cx,ptr->global,script,
			      strlen(script),NULL,lineno,&rval);
  strcpy(result,JS_GetStringBytes(JS_ValueToString(ptr->cx, rval)));
}

.