View mode: basic / threaded / horizontal-split · Log in · Help
December 10, 2012
std.algorithm Map using a external variable
I'm trying to use Map with a code like this :

...
  immutable int m = 10;
  int[] caca = [1,2,3,4];

  auto caca2 = map!( (a) {return a * m;})(caca);

  writeln(caca2);
...

I get a Segmentation fault some times:
The most interesting point it's that depends of the code around 
of it ins the same  program. for example If a use getopt at the 
begin of my program, then seg fault, etc...
 Looks that there some weird error in gdc 4.6.3

PD: Later I will put the whole code so any can see if I doing 
some weird thing that make map crazy
December 10, 2012
Re: std.algorithm Map using a external variable
On 2012-12-10 19:21, Zardoz wrote:
> I'm trying to use Map with a code like this :
>
> ...
>    immutable int m = 10;
>    int[] caca = [1,2,3,4];
>
>    auto caca2 = map!( (a) {return a * m;})(caca);
>
>    writeln(caca2);
> ...
>
> I get a Segmentation fault some times:
> The most interesting point it's that depends of the code around of it
> ins the same  program. for example If a use getopt at the begin of my
> program, then seg fault, etc...
>   Looks that there some weird error in gdc 4.6.3
>
> PD: Later I will put the whole code so any can see if I doing some weird
> thing that make map crazy

std.getopt uses module variables, don't know if that has anything to do 
with it.

-- 
/Jacob Carlborg
December 10, 2012
Re: std.algorithm Map using a external variable
On Mon, Dec 10, 2012 at 07:21:47PM +0100, Zardoz wrote:
> I'm trying to use Map with a code like this :
> 
> ...
>   immutable int m = 10;
>   int[] caca = [1,2,3,4];
> 
>   auto caca2 = map!( (a) {return a * m;})(caca);
> 
>   writeln(caca2);
> ...
> 
> I get a Segmentation fault some times:
> The most interesting point it's that depends of the code around of
> it ins the same  program. for example If a use getopt at the begin
> of my program, then seg fault, etc...
[...]

Do you have a compilable sample (possibly reduced from your full
sources) that exhibits this error? It would help track down the problem.

There are some known bugs related to map in older releases of D that may
be affecting you.


T

-- 
Give me some fresh salted fish, please.
December 10, 2012
Re: std.algorithm Map using a external variable
On Monday, 10 December 2012 at 18:21:48 UTC, Zardoz wrote:
> I'm trying to use Map with a code like this :
>
> ...
>   immutable int m = 10;
>   int[] caca = [1,2,3,4];
>
>   auto caca2 = map!( (a) {return a * m;})(caca);
>
>   writeln(caca2);
> ...
>
> I get a Segmentation fault some times:
> The most interesting point it's that depends of the code around 
> of it ins the same  program. for example If a use getopt at the 
> begin of my program, then seg fault, etc...
>  Looks that there some weird error in gdc 4.6.3
>
> PD: Later I will put the whole code so any can see if I doing 
> some weird thing that make map crazy

Looks like template lambda bug 
(http://d.puremagic.com/issues/show_bug.cgi?id=8899). It might 
depend not only on surrounding code, but on importing some phobos 
module (issue 8854).
December 10, 2012
Re: std.algorithm Map using a external variable
Well. I just try it again and I noticed this things :
-Changind the lambda function from :
  auto caca2 = map!((a) {return a * iDeltaT;})(caca);
 to :
  auto caca2 = map!((a) {return a + iDeltaT;})(caca);
 Avoid the segmentation fault
-Using dmd 2.60 avoid the segmentation fault.

The source code is in 
http://dl.dropbox.com/u/2716434/CodeThatCrash.tgz
The makefile only builds againts gdc, so to test it with dmd, I 
manually compiled the faulty code of serie2Sim.d with :
  dmd serie2Sim.d entity.d vector.d -ofserie2Sim
And I launch it with ./serie2Sim --rand 10 --seed 123
With dmd works, but with gdc not.


On Monday, 10 December 2012 at 18:59:31 UTC, H. S. Teoh wrote:
> On Mon, Dec 10, 2012 at 07:21:47PM +0100, Zardoz wrote:
>> I'm trying to use Map with a code like this :
>> 
>> ...
>>   immutable int m = 10;
>>   int[] caca = [1,2,3,4];
>> 
>>   auto caca2 = map!( (a) {return a * m;})(caca);
>> 
>>   writeln(caca2);
>> ...
>> 
>> I get a Segmentation fault some times:
>> The most interesting point it's that depends of the code 
>> around of
>> it ins the same  program. for example If a use getopt at the 
>> begin
>> of my program, then seg fault, etc...
> [...]
>
> Do you have a compilable sample (possibly reduced from your full
> sources) that exhibits this error? It would help track down the 
> problem.
>
> There are some known bugs related to map in older releases of D 
> that may
> be affecting you.
>
>
> T
Top | Discussion index | About this forum | D home