https://issues.dlang.org/show_bug.cgi?id=19783

Ulrich Küttler <kuettler@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|phobos                      |dmd

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https://issues.dlang.org/show_bug.cgi?id=19783

Tomáš Chaloupka <chalucha@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |betterC
                 CC|                            |chalucha@gmail.com

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https://issues.dlang.org/show_bug.cgi?id=19783

--- Comment #1 from Tomáš Chaloupka <chalucha@gmail.com> ---
Similar problem when using core.lifetime:

```D
import core.lifetime;
import core.stdc.stdlib;

struct Foo { int bar; }

extern(C) void main()
{
        auto pf = malloc(Foo.sizeof)[0..Foo.sizeof].emplace!Foo(42);
        assert(pf.bar == 42);
}
```

With: dmd -g -debug -betterC -ofbc bc.d

Leads to:
/usr/bin/ld: bc.o: in function
`_D4core8lifetime__T7emplaceTS2bc3FooTiZQuFNaNbNiAviZPQz':
/home/tomas/dlang/dmd-2.094.2/linux/bin64/../../src/druntime/import/core/lifetime.d:284:
undefined reference to `_D4core8lifetime16testEmplaceChunkFNaNbNiNfAvmmZv'

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https://issues.dlang.org/show_bug.cgi?id=19783

--- Comment #2 from Tomáš Chaloupka <chalucha@gmail.com> ---
For the record, this works (uses different template):

auto pf = (cast(Foo*)malloc(Foo.sizeof)).emplace!Foo(42);

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https://issues.dlang.org/show_bug.cgi?id=19783

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull

--- Comment #3 from Dlang Bot <dlang-bot@dlang.rocks> ---
@MoonlightSentinel created dlang/druntime pull request #3454 "Fix 19783 - Fail to emplace struct with betterC" fixing this issue:

- Fix 19783 - Fail to emplace struct with betterC

  Defining the helper function as a template ensures that it is available
  when not linking druntime.

  (`pragma(inline, true)` didn't work)

https://github.com/dlang/druntime/pull/3454

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https://issues.dlang.org/show_bug.cgi?id=19783

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from Dlang Bot <dlang-bot@dlang.rocks> ---
dlang/druntime pull request #3454 "Fix 19783 - Fail to emplace struct with betterC" was merged into master:

- 41df5db46f613b5f538d51d53441fcfbe2760aab by MoonlightSentinel:
  Fix 19783 - Fail to emplace struct with betterC

  Defining the helper function as a template ensures that it is available
  when not linking druntime.

  (`pragma(inline, true)` didn't work)

https://github.com/dlang/druntime/pull/3454

--