https://issues.dlang.org/show_bug.cgi?id=15626

Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla@digitalmars.com

--- Comment #1 from Walter Bright <bugzilla@digitalmars.com> ---
Thanks, Manu. The first thing I notice is main() is in C++. This will not work because it will bypass the D runtime initialization. That isn't what this bug is about, though. I'll see what I can do with this.

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https://issues.dlang.org/show_bug.cgi?id=15626

--- Comment #2 from Walter Bright <bugzilla@digitalmars.com> ---
Stripping away the unnecessary template and complex names:

---------- D -----------------
extern(C++)
{
    class C { }

    interface I
    {
        void f();
    }

    abstract class Base : I
    {
        int instance;
    }

    void test(Base b)
    {
        b.f();
    }

    void mainx();
}

int main()
{
    mainx();
    return 0;
}

------------- C++ ------------
#include <stdio.h>

class C { };

class I
{
    virtual void f() = 0;
};

class Base : public I
{
  public:
    int pInstance;

    Base() { pInstance = 0xBAADF00D; }
};

class Derived : public Base
{
  public:
    void f() { printf("!!"); }
};

void test(Base *b);

void mainx()
{
    Derived *d = new Derived;
    test(d);
}

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https://issues.dlang.org/show_bug.cgi?id=15626

--- Comment #3 from Walter Bright <bugzilla@digitalmars.com> ---
As a workaround, if you create a base class for 'Base' that contains a virtual function, in both the D and C++ code, it will work.

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https://issues.dlang.org/show_bug.cgi?id=15626

Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |C++

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https://issues.dlang.org/show_bug.cgi?id=15626

--- Comment #4 from Walter Bright <bugzilla@digitalmars.com> ---
https://github.com/D-Programming-Language/dmd/pull/5403

There's no easy way to hack this in. The trouble is you have a C++ base class with no virtual functions, so it has no vtbl[]. I.e. is it not a class at all, it is a struct. This is not supported.

The way to fix the code is to replace interface I with abstract class I, move the fields from C into I, and ditch class C entirely.

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https://issues.dlang.org/show_bug.cgi?id=15626

--- Comment #5 from github-bugzilla@puremagic.com ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/6d01b29c86aab514cf40d6657bad866c9f7fb4e8 fix Issue 15626 - extern(C++) calling crash

https://github.com/D-Programming-Language/dmd/commit/bbbba7b358a2824bab8421b0455b613d2b899f40 Merge pull request #5403 from WalterBright/fix15626

fix Issue 15626 - extern(C++) calling crash

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https://issues.dlang.org/show_bug.cgi?id=15626

github-bugzilla@puremagic.com changed:

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

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