If I read correctly, the following is legal code.  If you comment out one of the case statements, it does the expected thing.  With 4 or more, it crashes.  This is with dmd 2.064.2 on Debian.

If it's a bug, I'll file a report.  Thanks!

class BB {}
class DD : CC {}
class CC : BB {
  static CC create(string s) {
    // Succeeds with 3 cases, fails with 4
    switch (s) {
    case "en":
    case "it":
    case "ru":
    case "ko": return new DD;
    default: throw new Exception("blech");
    }
  }
}

void main() {
    CC.create("en");
}

jlquinn@wyvern:~/d$ ~/dmd2/linux/bin64/dmd switchbug.d -g
jlquinn@wyvern:~/d$ ./switchbug
Segmentation fault (core dumped)

Jerry:

> This is with dmd 2.064.2 on Debian.
> If it's a bug, I'll file a report.  Thanks!

I see no crash on Windows 32 bit.

Bye,
bearophile

On Wednesday, 27 November 2013 at 00:55:21 UTC, bearophile wrote:
> Jerry:
>
>> This is with dmd 2.064.2 on Debian.
>> If it's a bug, I'll file a report.  Thanks!
>
> I see no crash on Windows 32 bit.
>
> Bye,
> bearophile

No crash on Fedora 19 x86_64

Cheers G.

On Tue, Nov 26, 2013 at 06:33:28PM -0500, Jerry wrote:
> If I read correctly, the following is legal code.  If you comment out one of the case statements, it does the expected thing.  With 4 or more, it crashes.  This is with dmd 2.064.2 on Debian.
> 
> If it's a bug, I'll file a report.  Thanks!
> 
> class BB {}
> class DD : CC {}
> class CC : BB {
>   static CC create(string s) {
>     // Succeeds with 3 cases, fails with 4
>     switch (s) {
>     case "en":
>     case "it":
>     case "ru":
>     case "ko": return new DD;
>     default: throw new Exception("blech");
>     }
>   }
> }
> 
> void main() {
>     CC.create("en");
> }
> 
> jlquinn@wyvern:~/d$ ~/dmd2/linux/bin64/dmd switchbug.d -g
> jlquinn@wyvern:~/d$ ./switchbug
> Segmentation fault (core dumped)
[...]

No crash on dmd git HEAD, Debian/unstable (x86_64).


T

-- 
"Outlook not so good." That magic 8-ball knows everything! I'll ask about Exchange Server next. -- (Stolen from the net)

On Tuesday, 26 November 2013 at 23:33:30 UTC, Jerry wrote:
> This is with dmd 2.064.2 on Debian.

windows 64 bit no crash.

No crash on Linux (Kubuntu) 32bits, DMD 2.064.2.

Works with 5 or 6 case's also.

"H. S. Teoh" <hsteoh@quickfur.ath.cx> writes:

> On Tue, Nov 26, 2013 at 06:33:28PM -0500, Jerry wrote:
>> If I read correctly, the following is legal code.  If you comment out one of the case statements, it does the expected thing.  With 4 or more, it crashes.  This is with dmd 2.064.2 on Debian.
>> 
>> If it's a bug, I'll file a report.  Thanks!
>> 
>> class BB {}
>> class DD : CC {}
>> class CC : BB {
>>   static CC create(string s) {
>>     // Succeeds with 3 cases, fails with 4
>>     switch (s) {
>>     case "en":
>>     case "it":
>>     case "ru":
>>     case "ko": return new DD;
>>     default: throw new Exception("blech");
>>     }
>>   }
>> }
>> 
>> void main() {
>>     CC.create("en");
>> }
>> 
>> jlquinn@wyvern:~/d$ ~/dmd2/linux/bin64/dmd switchbug.d -g
>> jlquinn@wyvern:~/d$ ./switchbug
>> Segmentation fault (core dumped)
> [...]
>
> No crash on dmd git HEAD, Debian/unstable (x86_64).
>

If I build dmd from the sources, the program works.  It's only the precompiled dmd executable that generates a broken binary.

Jerry <jlquinn@optonline.net> writes:

> "H. S. Teoh" <hsteoh@quickfur.ath.cx> writes:
>
>> On Tue, Nov 26, 2013 at 06:33:28PM -0500, Jerry wrote:
>>> If I read correctly, the following is legal code.  If you comment out one of the case statements, it does the expected thing.  With 4 or more, it crashes.  This is with dmd 2.064.2 on Debian.
>>> 
>>> If it's a bug, I'll file a report.  Thanks!
>>> 
>>> class BB {}
>>> class DD : CC {}
>>> class CC : BB {
>>>   static CC create(string s) {
>>>     // Succeeds with 3 cases, fails with 4
>>>     switch (s) {
>>>     case "en":
>>>     case "it":
>>>     case "ru":
>>>     case "ko": return new DD;
>>>     default: throw new Exception("blech");
>>>     }
>>>   }
>>> }
>>> 
>>> void main() {
>>>     CC.create("en");
>>> }
>>> 
>>> jlquinn@wyvern:~/d$ ~/dmd2/linux/bin64/dmd switchbug.d -g
>>> jlquinn@wyvern:~/d$ ./switchbug
>>> Segmentation fault (core dumped)
>> [...]
>>
>> No crash on dmd git HEAD, Debian/unstable (x86_64).
>>
>
> If I build dmd from the sources, the program works.  It's only the precompiled dmd executable that generates a broken binary.

Sorry, not true.  I had the extra case commented out.  Uncommenting it still gives me a crashing program.

Philippe Sigaud <philippe.sigaud@gmail.com> writes:

> No crash on Linux (Kubuntu) 32bits, DMD 2.064.2.
>
> Works with 5 or 6 case's also.

This is actually Ubuntu 12.10 64 bit.  The last mysterious crash I had was due to the use of gold vs ld.  It seems Debian and Ubuntu are the only ones using gold at the moment.

I'm wondering if this problem is the same kind of thing.

Jerry

On Wednesday, 27 November 2013 at 07:09:17 UTC, Jerry wrote:
> Philippe Sigaud <philippe.sigaud@gmail.com> writes:
>
>> No crash on Linux (Kubuntu) 32bits, DMD 2.064.2.
>>
>> Works with 5 or 6 case's also.
>
> This is actually Ubuntu 12.10 64 bit.  The last mysterious crash I had
> was due to the use of gold vs ld.  It seems Debian and Ubuntu are the
> only ones using gold at the moment.
>
> I'm wondering if this problem is the same kind of thing.
>
> Jerry

Yes, I faced quite a lot of trouble with gold and dmd. They simply do not mix.