• Ellery Newcomer <ellery-newcomer utulsa.edu> Feb 23 2010
• bearophile <bearophileHUGS lycos.com> Feb 24 2010
• Ellery Newcomer <ellery-newcomer utulsa.edu> Feb 24 2010
• Daniel Keep <daniel.keep.lists gmail.com> Feb 24 2010
• Ellery Newcomer <ellery-newcomer utulsa.edu> Feb 24 2010
• Robert Clipsham <robert octarineparrot.com> Feb 24 2010
• Ellery Newcomer <ellery-newcomer utulsa.edu> Feb 24 2010
• Robert Clipsham <robert octarineparrot.com> Feb 24 2010
• Ellery Newcomer <ellery-newcomer utulsa.edu> Feb 24 2010
• Robert Clipsham <robert octarineparrot.com> Feb 24 2010
• grauzone <none example.net> Feb 25 2010
• bearophile <bearophileHUGS lycos.com> Feb 24 2010
• bearophile <bearophileHUGS lycos.com> Feb 24 2010

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

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

bearophile <bearophileHUGS lycos.com> writes:

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

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

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

Daniel Keep <daniel.keep.lists gmail.com> writes:

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.

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

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?

Robert Clipsham <robert octarineparrot.com> writes:

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.

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

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.

Robert Clipsham <robert octarineparrot.com> writes:

On 24/02/10 17:51, Ellery Newcomer wrote:
 ----
 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.


Hmm, that's odd... if you type b _d_t<tab> or b _d_<tab> then you should 
get a list of runtime functions, do you see anything listed there that 
could be related? It seems odd to me that that function isn't there, it 
always is for me. I'm pretty sure I use a debug version of the runtime 
though, so that could be it. Your best option is probably to use Tango's 
built in stack tracing for now if you can't get gdb working properly. 
I've never had issues with it, but I use a custom version of gdb with 
the D patches applied, as well as a compiler built with debug symbols, 
and the runtime/other libraries built with them too in most cases.

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

On 02/24/2010 12:37 PM, Robert Clipsham wrote:
 On 24/02/10 17:51, Ellery Newcomer wrote:
 ----
 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.


 Hmm, that's odd... if you type b _d_t<tab> or b _d_<tab> then you should
 get a list of runtime functions, do you see anything listed there that
 could be related? It seems odd to me that that function isn't there, it
 always is for me. I'm pretty sure I use a debug version of the runtime
 though, so that could be it. Your best option is probably to use Tango's
 built in stack tracing for now if you can't get gdb working properly.
 I've never had issues with it, but I use a custom version of gdb with
 the D patches applied, as well as a compiler built with debug symbols,
 and the runtime/other libraries built with them too in most cases.


Oooh! nice trick!
Ah, it's '_d_throw 4' and quotes help. Yahoo!


Do I need to do anything special to get stack tracing to work? when I 
try to compile a simple program it barfs on me and gives

undefined reference to `dladdr'

from

import tango.core.tools.TraceExceptions;

void main(){
int[] i = [1,2];
int[]  j = new int[3];
j[] = i[];
}

oh well. Thanks a ton, I'm back in business now!

Robert Clipsham <robert octarineparrot.com> writes:

On 24/02/10 20:20, Ellery Newcomer wrote:
 Oooh! nice trick!
 Ah, it's '_d_throw 4' and quotes help. Yahoo!


 Do I need to do anything special to get stack tracing to work? when I
 try to compile a simple program it barfs on me and gives

 undefined reference to `dladdr'

 from

 import tango.core.tools.TraceExceptions;

 void main(){
 int[] i = [1,2];
 int[] j = new int[3];
 j[] = i[];
 }

 oh well. Thanks a ton, I'm back in business now!


Add -L-ldl to your command line when compiling, it should be linked in 
anyway, apparently it isn't though. You may have to put it before tango 
in your command line, maybe not... if it doesn't work, play with its 
position until it does.

grauzone <none example.net> writes:

Ellery Newcomer wrote:
 On 02/24/2010 12:37 PM, Robert Clipsham wrote:
 On 24/02/10 17:51, Ellery Newcomer wrote:
 ----
 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.


 Hmm, that's odd... if you type b _d_t<tab> or b _d_<tab> then you should
 get a list of runtime functions, do you see anything listed there that
 could be related? It seems odd to me that that function isn't there, it
 always is for me. I'm pretty sure I use a debug version of the runtime
 though, so that could be it. Your best option is probably to use Tango's
 built in stack tracing for now if you can't get gdb working properly.
 I've never had issues with it, but I use a custom version of gdb with
 the D patches applied, as well as a compiler built with debug symbols,
 and the runtime/other libraries built with them too in most cases.


 Oooh! nice trick!
 Ah, it's '_d_throw 4' and quotes help. Yahoo!


By the way, that's because someone defined _d_throw to have Windows 
calling convention, even on Linux. I wonder what that's useful for.

 
 Do I need to do anything special to get stack tracing to work? when I 
 try to compile a simple program it barfs on me and gives
 
 undefined reference to `dladdr'
 
 from
 
 import tango.core.tools.TraceExceptions;


You must link to libdl (-ldl).

 void main(){
 int[] i = [1,2];
 int[]  j = new int[3];
 j[] = i[];
 }
 
 oh well. Thanks a ton, I'm back in business now!

bearophile <bearophileHUGS lycos.com> writes:

Ellery Newcomer:
 I want line numbers


You can file a low priority bug request on this then.

Bye,
bearophile

bearophile <bearophileHUGS lycos.com> writes:

Ellery Newcomer:
 I want line numbers


http://d.puremagic.com/issues/show_bug.cgi?id=3851

Bye,
bearophile