Hi, all.
I have a question.
When 'testdic' file does' t exist, something  wrong.

---
import std.mmFile;

int main() {
  auto x = new MmFile("testdic",MmFile.Mode.readWrite,0,null);
  return 0;
}

---
OSX 10.10.3 ,
DMD64 D Compiler v2.069-devel-d0327d9

After testdic file (size=0) was made, Segmentation Fault: 11 .

I don't know whether this code is typical use.
Is this Phobos BUG? or BY DESIGN?

On Wednesday, 26 August 2015 at 15:49:23 UTC, Junichi Nakata wrote:
> Hi, all.
> I have a question.
> When 'testdic' file does' t exist, something  wrong.
>
> ---
> import std.mmFile;
>
> int main() {
>   auto x = new MmFile("testdic",MmFile.Mode.readWrite,0,null);
>   return 0;
> }
>
> ---
> OSX 10.10.3 ,
> DMD64 D Compiler v2.069-devel-d0327d9
>
> After testdic file (size=0) was made, Segmentation Fault: 11 .
>
> I don't know whether this code is typical use.
> Is this Phobos BUG? or BY DESIGN?

Note that mmap-ing a zero-length range is invalid on Linux. Dunno about OSX; it shouldn't segfault though.

On Wednesday, 26 August 2015 at 17:30:29 UTC, Alex Parrill wrote:
> On Wednesday, 26 August 2015 at 15:49:23 UTC, Junichi Nakata wrote:
>> Hi, all.
>> I have a question.
>> When 'testdic' file does' t exist, something  wrong.
>>
>> ---
>> import std.mmFile;
>>
>> int main() {
>>   auto x = new MmFile("testdic",MmFile.Mode.readWrite,0,null);
>>   return 0;
>> }
>>
>> ---
>> OSX 10.10.3 ,
>> DMD64 D Compiler v2.069-devel-d0327d9
>>
>> After testdic file (size=0) was made, Segmentation Fault: 11 .
>>
>> I don't know whether this code is typical use.
>> Is this Phobos BUG? or BY DESIGN?
>
> Note that mmap-ing a zero-length range is invalid on Linux. Dunno about OSX; it shouldn't segfault though.

https://issues.dlang.org/show_bug.cgi?id=14968

On Wednesday, 26 August 2015 at 22:07:01 UTC, rsw0x wrote:
> On Wednesday, 26 August 2015 at 17:30:29 UTC, Alex Parrill wrote:
>> On Wednesday, 26 August 2015 at 15:49:23 UTC, Junichi Nakata wrote:
>>> Hi, all.
>>> I have a question.
>>> When 'testdic' file does' t exist, something  wrong.
>>>
>>> ---
>>> import std.mmFile;
>>>
>>> int main() {
>>>   auto x = new MmFile("testdic",MmFile.Mode.readWrite,0,null);
>>>   return 0;
>>> }
>>>
>>> ---
>>> OSX 10.10.3 ,
>>> DMD64 D Compiler v2.069-devel-d0327d9
>>>
>>> After testdic file (size=0) was made, Segmentation Fault: 11 .
>>>
>>> I don't know whether this code is typical use.
>>> Is this Phobos BUG? or BY DESIGN?
>>
>> Note that mmap-ing a zero-length range is invalid on Linux. Dunno about OSX; it shouldn't segfault though.
>
> 

From OS X 10.10.3 manage on mmap:

ERRORS
...
[EINVAL]           The len argument was negative.

append to https://issues.dlang.org/show_bug.cgi?id=14968

thanks.

On Wednesday, 26 August 2015 at 17:30:29 UTC, Alex Parrill wrote:
> it shouldn't segfault though.

The segfault is because of:

https://issues.dlang.org/show_bug.cgi?id=14993

It "should've" been an InvalidMemoryOperationError, which in turn was caused by:

https://issues.dlang.org/show_bug.cgi?id=14994
https://issues.dlang.org/show_bug.cgi?id=14995