release building problem

[Oleg via Digitalmars-d-learn]

When I build my program with release flag I get an errors, in 
debug build all works

.dub/build/application-profile-linux.posix-x86_64-dmd-AD20DEA65FEE410217932549C1D262EF/ftree.o: 
In function 
`_D3des4flow5event5Event27__T6__ctorTS6client6ClientZ6__ctorMFNcmKxS6client6ClientZS3des4flow5event5Event':
/home/deviator/workspace/cdsd/fractaltree/descore/import/des/flow/event.d:62: 
undefined reference to 
`_D6object43__T4_dupTxS6client6ClientTyS6client6ClientZ4_dupFNaNbAxS6client6ClientZAyS6client6Client'
.dub/build/application-profile-linux.posix-x86_64-dmd-AD20DEA65FEE410217932549C1D262EF/ftree.o: 
In function 
`_D3des4util5pdata5PData27__T6__ctorTS6client6ClientZ6__ctorMFNaNbNcNfKxS6client6ClientZS3des4util5pdata5PData':
/home/deviator/workspace/cdsd/fractaltree/descore/import/des/util/pdata.d:40: 
undefined reference to 
`_D6object43__T4_dupTxS6client6ClientTyS6client6ClientZ4_dupFNaNbAxS6client6ClientZAyS6client6Client'
.dub/build/application-profile-linux.posix-x86_64-dmd-AD20DEA65FEE410217932549C1D262EF/ftree.o: 
In function `_D4sock2we6SockWE10emitEventsMFZv':
/home/deviator/workspace/cdsd/fractaltree/src/sock/we.d:134: 
undefined reference to 
`_D6object43__T4_dupTxS6client6ClientTyS6client6ClientZ4_dupFNaNbAxS6client6ClientZAyS6client6Client'

It may be a compiler bug, but now I must find workaround.

 From mangle 
`_D6object43__T4_dupTxS6client6ClientTyS6client6ClientZ4_dupFNaNbAxS6client6ClientZAyS6client6Client' 
I can understood what no 'dup(Client)' function. But I dont 
understand where it calls. Ctors flow.event.Event and 
des.util.pdata.PData
looks like 'this(T)( ref const(T) val )' and dont use 'dup' 
function. Whey use 'idup' function for 'T[]'.

struct Client
{
size_t id;
vec3 orient; // struct vec3 { float[3] data; }
vec3 motion;
float p1;
}

Where I must find solution?