[Bug 36743] New: rpcrt4 tests fail when using widl "-Oif" option

http://bugs.winehq.org/show_bug.cgi?id=36743

Bug ID: 36743
           Summary: rpcrt4 tests fail when using widl "-Oif" option
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rpc
          Assignee: [e-mail]
          Reporter: [e-mail]

Hello,

in order to squash https://jira.reactos.org/browse/CORE-8200 out, I tried to
run rpcrt4 tests with the "modern" type stubs instead of the ones currently
used in wine tree.

As expected, this led to memory corruption and wrong test results. Attached is
a valgrind report of "rpcrt4_test server" with +ole,+rpc debug channel, with
quite a lot of invalid read and invalid free.

For instance, the call to get_names function triggers invalid read such as this
one:

==30367== Invalid read of size 4
==30367==    at 0x5672AEB: ComputeConformanceOrVariance (ndr_marshall.c:634)
==30367==    by 0x5674D9F: NdrConformantArrayFree (ndr_misc.h:39)
==30367==    by 0x567EF19: NdrStubCall2 (ndr_stubless.c:144)
==30367==    by 0x567F1DD: NdrServerCall2 (ndr_stubless.c:1450)
==30367==    by 0x568EA29: process_request_packet (rpc_server.c:441)
==30367==    by 0x568EFB9: RPCRT4_worker_thread (rpc_server.c:519)
==30367==    by 0x7BC8BC9F: worker_thread_proc (threadpool.c:110)
==30367==    by 0x7BC7FBDF: ??? (in
/home/jerome/wine-fun/wine-build/dlls/ntdll/ntdll.dll.so)
==30367==    by 0x7BC82B6C: call_thread_func (signal_i386.c:2630)
==30367==    by 0x7BC7FBBD: ??? (in
/home/jerome/wine-fun/wine-build/dlls/ntdll/ntdll.dll.so)
==30367==    by 0x7BC89367: start_thread (thread.c:428)
==30367==    by 0x4223D77: start_thread (pthread_create.c:311)
==30367==  Address 0x4cdea40 is 16 bytes after a recently re-allocated block of
size 32 alloc'd

To reproduce, change dlls/rpcrt4/tests.Makefile.in:
"EXTRAIDLFLAGS = --prefix-server=s_" --> "EXTRAIDLFLAGS = --prefix-server=s_
-Oif"