https://issues.dlang.org/show_bug.cgi?id=12839

--- Comment #1 from John Colvin <john.loughran.colvin@gmail.com> ---
Interestingly, the following works fine. It should be the same as the lambda-based version, no?

import std.parallelism;
import std.algorithm;

auto loo(int a, int[] b)
{
    auto inner(int c)
    {
        return a;
    }
    auto wrapper(int x)
    {
        auto wrapperInner()
        {
            return inner(x);
        }
        return &wrapperInner;
    }
    return b.map!wrapper;
}

void main()
{
    defaultPoolThreads = 1;
    auto res = loo(3, [1,2,3]);
    auto jobs = taskPool.map!"a()"(res);
    assert(jobs.front() == 3);
}

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https://issues.dlang.org/show_bug.cgi?id=12839

--- Comment #2 from John Colvin <john.loughran.colvin@gmail.com> ---
sorry, ignore the () on jobs.front

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https://issues.dlang.org/show_bug.cgi?id=12839

Maxim Fomin <maxim-fomin@outlook.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |maxim-fomin@outlook.com
                 OS|Linux                       |All

--- Comment #3 from Maxim Fomin <maxim-fomin@outlook.com> ---
Fails on win64 too.

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https://issues.dlang.org/show_bug.cgi?id=12839

sinkuupump@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sinkuupump@gmail.com
          Component|Phobos                      |DMD

--- Comment #4 from sinkuupump@gmail.com ---
Even replacing "taskPool.amap" with "map!"a()".array", it still segfaults.


import std.algorithm;
import std.array;

auto loo(int a, int[] b)
{
    auto inner(int c)
    {
        return a; // debugger caught SEGV at this line
    }
    return b.map!((x) => () => inner(x));
}

void main()
{
    auto res = loo(3, [1,2,3]);
    auto jobs = map!"a()"(res).array; // evaluate eagerly
}


I reduced 'map' version, and found that just returning "() => () => inner()"
and calling it segfaults. IIUC this seems a compiler bug.


auto loo(int a)
{
    auto inner()
    {
        return a; // debugger caught SEGV at this line
    }

    return () => () => inner();
}

void main()
{
    assert(loo(3)()() == 3);
}

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https://issues.dlang.org/show_bug.cgi?id=12839

--- Comment #5 from Maxim Fomin <maxim-fomin@outlook.com> ---
Now it gives ice.

auto loo(int a)
{
    auto inner()
    {
        return a; // debugger caught SEGV at this line
    }

    return () => () => inner();
}

void main()
{
    assert(loo(3)()() == 3);
}

DMD v2.068-devel-df9b8af-dirty DEBUG
dmd: toir.c:183: elem* getEthis(Loc, IRState*, Dsymbol*): Assertion
`thisfd->isNested() || thisfd->vthis' failed.
Aborted

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https://issues.dlang.org/show_bug.cgi?id=12839

Andrei Alexandrescu <andrei@erdani.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unspecified                 |D2

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https://issues.dlang.org/show_bug.cgi?id=12839

Lars T. Kyllingstad <bugzilla@kyllingen.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzilla@kyllingen.net

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https://issues.dlang.org/show_bug.cgi?id=12839

--- Comment #6 from Lars T. Kyllingstad <bugzilla@kyllingen.net> ---
See also issue #16051, which deals with the same ICE.  Not sure if it's a duplicate, though.

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https://issues.dlang.org/show_bug.cgi?id=12839

RazvanN <razvan.nitu1305@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |razvan.nitu1305@gmail.com
         Resolution|---                         |FIXED

--- Comment #7 from RazvanN <razvan.nitu1305@gmail.com> ---
All the examples in this bug report now compile successfully. However, Issue 16051 is still valid. Closing as fixed.

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