exceptions

[Ellery Newcomer]

On 02/24/2010 10:35 AM, Robert Clipsham wrote:
> On 24/02/10 15:21, Ellery Newcomer wrote:
>> On 02/24/2010 09:00 AM, Daniel Keep wrote:
>>>
>>>
>>> Ellery Newcomer wrote:
>>>> On 02/24/2010 03:10 AM, bearophile wrote:
>>>>> Ellery Newcomer:
>>>>>> Okay, does anyone know a good way to figure out where something like
>>>>>> this is coming from:
>>>>>> object.Exception: lengths don't match for array copy
>>>>>
>>>>> void main() {
>>>>> auto a1 = new int[5];
>>>>> auto a2 = new int[4];
>>>>> a1[] = a2;
>>>>> }
>>>>>
>>>>> Bye,
>>>>> bearophile
>>>>
>>>> I want line numbers
>>>
>>> You could use Tango and enable stack tracing. That or hook up a
>>> debugger.
>>
>> I am using tango, how do I enable stack tracing?
>
> ----
> import tango.core.tools.TraceExceptions;
> ----
>
> If you want to use gdb then type 'b _d_throw_exception' (or 'b _d_throw'
> for dmd) before you run your app. This will break on every exception
> thrown, so you may have to hit 'c' a few times to continue at each
> thrown exception until you find the one you need.

Thanks!

b _d_throw gives me

Function "_d_throw" not defined.

same for _d_throw_exception.

I can get a breakpoint on _d_arraycopy, but there seem to be way too 
many calls for it to be useful.