http://d.puremagic.com/issues/show_bug.cgi?id=9418

           Summary: Segmentation fault using only datetime and stdio.
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: knud@all-technology.com


--- Comment #0 from Knud <knud@all-technology.com> 2013-01-28 13:40:45 PST ---
Here is a simple program which provoke a Segmentation fault on Linux.


#!/usr/bin/rdmd
import std.datetime;
import std.stdio;

void main()
{
auto today=~Clock.currTime().toISOString()[0..8];

writeln(today);

}

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Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andrej.mitrovich@gmail.com
           Platform|x86                         |All
         OS/Version|Linux                       |All


--- Comment #1 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2013-02-05 08:54:30 PST ---
How strange, what is the tilde operating on in this code? For example:

import std.datetime;
import std.stdio;

void main()
{
    auto x1 = ~Clock; // NG
    auto x2 = ~Clock.currTime(); // NG
    auto x3 = ~Clock.currTime().toISOString(); // NG
    auto x4 = Clock.currTime().toISOString()[0 .. 8];
    auto x5 = ~x4;  // NG
    auto x5 = ~Clock.currTime().toISOString()[0 .. 8];  // works?!
}

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Maxim Fomin <maxim@maxim-fomin.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |maxim@maxim-fomin.ru


--- Comment #2 from Maxim Fomin <maxim@maxim-fomin.ru> 2013-02-05 09:51:39 PST ---
(In reply to comment #1)
> How strange, what is the tilde operating on in this code? For example:

Indeed this is strange.

> import std.datetime;
> import std.stdio;
> 
> void main()
> {
>     auto x1 = ~Clock; // NG
>     auto x2 = ~Clock.currTime(); // NG
>     auto x3 = ~Clock.currTime().toISOString(); // NG
>     auto x4 = Clock.currTime().toISOString()[0 .. 8];
>     auto x5 = ~x4;  // NG
>     auto x5 = ~Clock.currTime().toISOString()[0 .. 8];  // works?!
> }

Actually it operates on dynamic array honestly corrupting (complementing) both length and ptr properties.

import core.stdc.stdio : printf;

void main()
{
    string foo = "foo";
    printf(".length = %d, .ptr=%p\n", foo.length, foo.ptr);
    foo = ~foo[] ;
    printf(".length = %d, .ptr=%p\n", foo.length, foo.ptr);
}

My guess is that slice expression escapes internal dmd checks.

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Kenji Hara <k.hara.pg@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |accepts-invalid, pull,
                   |                            |wrong-code
           Severity|normal                      |major


--- Comment #3 from Kenji Hara <k.hara.pg@gmail.com> 2013-02-05 23:22:36 PST ---
(In reply to comment #2)
> My guess is that slice expression escapes internal dmd checks.

That is correct. At least, glue layer should reject such incorrect codegen.

https://github.com/D-Programming-Language/dmd/pull/1628

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--- Comment #4 from github-bugzilla@puremagic.com 2013-02-06 00:47:22 PST ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/f13ce3739b2a15c18a3e0923507a6652bda4c288 fix Issue 9418 - Segmentation fault using only datetime and stdio.

At least glue layer should reject invalid array-operation, as same as NegExp, BinExp, PowAssignExp, and PowExp.

https://github.com/D-Programming-Language/dmd/commit/cf85813054054dfe6605ef1f184bf12eab668c1e Merge pull request #1628 from 9rnsr/fix9418

Issue 9418 + 9458 - Invalid array operation should be rejected in glue layer

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla@digitalmars.com
         Resolution|                            |FIXED


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