Spurious trampoline when calling function from DLL

Question

I have a simple console application:

extern "C" __declspec(dllimport) void foo();

int main()
{
    foo();
}

which calls a function from DLL:

#include <stdio.h>
extern "C" __declspec(dllexport) void foo() {
    printf("Hello from foo\n");
}

When I step into foo() call in Disassembly window (Debug -> Windows -> Disassembly)

I can see that instead of jumping directly to implementation of foo() in DLL it goes through intermediate dummy trampoline which is also located in DLL:

I haven't found any information about such trampoline in MSDN documentation. Perhaps anyone knows why it exists? I'm using the latest Visual Studio Community for compilation.

PS: Interestingly enough, the trampoline is present only in Debug build and disappears in Release. It's also not present when compiling code with Cygwin or Msys.