2500 – template struct methods are left unresolved if imported from multiple modules

The smallest test case I could find that fails for both D1 and D2 follows:
module A;
import B;
import C;
public class A
{
 T!(A) c;
}
void main()
{
 A a = new A();
 a.c.foo();
}
// B.d
module B;
import A;
import C;
class B
{
 T!(A) t;
}
// C.d
module C;
struct T(Type)
{
 void foo(){}
}
If anyone knows a workaround *please* let me know.

Oopps, I forgot to add some importannt information...
The compilation command sequence I used is:
# dmd a -c // ok
# dmd b -c // ok
# dmd c -c // ok
# dmd a.obj b.obj c.obj // link error
Error 42: Symbol Undefined _D1C12__T1TTC1A1AZ1T3fooMFZv
--- errorlevel 1

Confirmed on Linux as well.
Note that the following commands work ok:
dmd A.d B.d C.d
or
dmd -c A.d B.d C.d
dmd A.o B.o C.o
It seems that in the first (without -c), the symbol is defined in A.o
In the second case, now B.o has the symbol defined, whereas if you compile B.d separate, it is not defined. There is definitely a bug if compiling the files into objects separately generates different code than compiling them in to objects in one line.

What's happening is A.d thinks that T!(int) is instantiated by B, and B thinks it is instantiated in A. (T!(A) can be T!(int), the A just confuses things.) The workaround is:
1. compile A and B on the same command, instead of separately.
2. structure A and B so they don't import each other.

Fixed dmd 1.038 amd 2.022

Fix was reverted in 1.039 because it was causing hideously slow compile times for some code.

The test case still fails to compile with 2.066.1.
https://github.com/D-Programming-Language/dmd/pull/4384 

*** Issue 12099 has been marked as a duplicate of this issue. ***

Commits pushed to master at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/5ba40267bb26f5405e829112933d1d4e5c179d61
fix Issue 2500 - template struct methods are left unresolved if imported from multiple modules
https://github.com/D-Programming-Language/dmd/commit/c4387428c034ae83fa2504379c68ed3ac354d58f
Merge pull request #4384 from 9rnsr/fix2644
Issue 2644 & 2500 & 10920 - Unresolved template reference

Commits pushed to https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/5ba40267bb26f5405e829112933d1d4e5c179d61
fix Issue 2500 - template struct methods are left unresolved if imported from multiple modules
https://github.com/D-Programming-Language/dmd/commit/c4387428c034ae83fa2504379c68ed3ac354d58f
Merge pull request #4384 from 9rnsr/fix2644