DevString Forwarded Attribute: is it possible?

Hello, I have created a very simple ds with pogo 9.4.5: it has only one FwdAttr, compile: ok, db config of __root_att with the string_scalar attribute of TangoTest. At the very first read of the FwdAttr I get a seg fault:

 (gdb) bt
#0  0xb76eb424 in __kernel_vsyscall ()
#1  0xb6757681 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb675aab2 in *__GI_abort () at abort.c:92
#3  0xb679124d in __libc_message (do_abort=2, fmt=0xb6868e58 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
#4  0xb679b341 in malloc_printerr (action=<value optimized out>, str=0x6 <Address 0x6 out of bounds>, ptr=0x975f8b0) at malloc.c:6266
#5  0xb679c5be in munmap_chunk (p=<value optimized out>) at malloc.c:3540
#6  0xb698c741 in operator delete(void*) () from /usr/lib/libstdc++.so.6
#7  0xb698c79d in operator delete[](void*) () from /usr/lib/libstdc++.so.6
#8  0xb7348b34 in Tango::Attribute::set_value (this=0x978f2c0, p_data=0x975f8b0, x=1, y=0, release=true) at ../../../../lib/cpp/server/attrsetval.cpp:746
#9  0xb7348d0b in Tango::Attribute::set_value_date_quality (this=0x978f2c0, p_data=0x975f8b0, t=..., qual=Tango::ATTR_VALID, x=1, y=0, release=<value optimized out>)
    at ../../../../lib/cpp/server/attrsetval.cpp:1947
#10 0xb741f770 in void Tango::FwdAttribute::set_local_attribute<Tango::DevVarStringArray>(Tango::DeviceAttribute&, Tango::DevVarStringArray*&) () from /usr/local/tango-9.2.5a/lib/libtango.so.9
#11 0xb741bdbc in Tango::FwdAttr::read (this=0x9771998, dev=0x9771e70, attr=...) at ../../../../lib/cpp/server/fwdattrdesc.cpp:380
#12 0xb73a7107 in Tango::Device_3Impl::read_attributes_no_except (this=0x9771e70, names=..., aid=..., second_try=true, idx=...) at ../../../../lib/cpp/server/device_3.cpp:541
#13 0xb73b7c22 in Tango::Device_4Impl::read_attributes_4 (this=0x9771e70, names=..., source=Tango::CACHE_DEV, cl_id=...) at ../../../../lib/cpp/server/device_4.cpp:727
#14 0xb75b57fe in _0RL_lcfn_6fe2f94a21a10053_c3000000 (cd=0xa7a66914, svnt=0x97722a4) at tangoSK.cpp:5510
#15 0xb6f4d748 in omniCallHandle::upcall(omniServant*, omniCallDescriptor&) () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#16 0xb75c144e in Tango::_impl_Device_4::_dispatch (this=0x97722a0, _handle=...) at tangoSK.cpp:5966
#17 0xb75c7c32 in Tango::_impl_Device_5::_dispatch (this=0x97722a0, _handle=...) at tangoSK.cpp:7478
#18 0xb6f3857a in omni::omniOrbPOA::dispatch(omniCallHandle&, omniLocalIdentity*) () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#19 0xb6f16916 in omniLocalIdentity::dispatch(omniCallHandle&) () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#20 0xb6f73bc1 in omni::GIOP_S::handleRequest() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#21 0xb6f759f5 in omni::GIOP_S::dispatcher() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#22 0xb6f70b97 in omni::giopWorker::execute() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#23 0xb6f0bb5d in omniAsyncWorker::real_run() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#24 0xb6f0bfcb in omniServerWorkerInfo::run() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#25 0xb6f0d0da in omniAsyncPoolServer::workerRun(omniAsyncWorker*) () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#26 0xb6f0c4cb in omniAsyncWorker::mid_run() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#27 0xb6f0c7cb in omniAsyncWorkerInfo::run() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#28 0xb756e2ae in Tango::create_PyPerThData (info=...) at ../../../../lib/cpp/server/utils.cpp:3234
#29 0xb6f0c7b9 in omniAsyncWorkerInfo::run() () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#30 0xb6f0d1b2 in omniAsyncWorker::run(void*) () from /usr/local/omniorb-4.2.1/lib/libomniORB4.so.2
#31 0xb6a43687 in omni_thread_wrapper () from /usr/local/omniorb-4.2.1/lib/libomnithread.so.4
#32 0xb671896e in start_thread (arg=0xa7a67b70) at pthread_create.c:300
#33 0xb68003fe in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
(gdb) f 8
#8  0xb7348b34 in Tango::Attribute::set_value (this=0x978f2c0, p_data=0x975f8b0, x=1, y=0, release=true) at ../../../../lib/cpp/server/attrsetval.cpp:746
746                 SAFE_DELETE(p_data);
(gdb) p *p_data
$14 = (Tango::DevString) 0x9772738 "ValueOfStringScalar"

If I try with a DevDouble root attribute the ds with the FwdAttr works well. Where am I wrong? In the docs I do not see any warning about DevString forwarded attributes...

Thank you in advance, Alessandro

tango-controls / cppTango

DevString Forwarded Attribute: is it possible? #512