Subj : JS_THREADSAFE makes jsshell.exe fail  - Reference Error
To   : netscape.public.mozilla.jseng
From : Timothy Clancy
Date : Sat Apr 30 2005 08:12 pm

I've compiled SpiderMonkey - the latest stable release with 
JS_THREADSAFE defined.  I've downloaded the NSPR library (4.4.1.0) for 
my compiler (MSVC 2002).  I've also compiled the shell for testing again 
with JS_THREADSAFE defined.  All files are in the same folder (js32.dll, 
libnspr4.dll, jsshell.exe, perfect.js).

When I run the 'jsshell.exe perfect.js' from the command line I get the 
following output.

---

 > jsshell perfect.js 
                A number is 'perfect' if it is equal to the sum of its 
divisors (excluding itself).

perfect.js:16: ReferenceError: n is not defined

---

n is a function argument (the first variable defined) and line 16 is the 
first time that variable is used.

When I compile the js without NSPR, I can run this successfully.  Do I 
need to rewrite the shell program to explicitly make use of threads?  I 
would think that being "THREADSAFE" would imply a choice between using 
threads or not - so that coding practices only need to change if you are 
running js in multiple threads (which I will be when I sort this out).

Thanks,
Tim

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