[Bug 47032] New: valgrind reports uninitialized read in writev from call_req_handler

https://bugs.winehq.org/show_bug.cgi?id=47032

Bug ID: 47032
           Summary: valgrind reports uninitialized read in writev from
                    call_req_handler
           Product: Wine
           Version: 4.6
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 64201
  --> https://bugs.winehq.org/attachment.cgi?id=64201
Output when running main.exe under valgrind

Starting with cloning the source tree

$ git clone git://source.winehq.org/git/wine.git

$ mkdir wine64_build
    $ cd wine64_build
    $ ../wine/configure --enable-win64
    $ make
    $ cd ..

$ mkdir test_program
    $ cd test_program
    $ echo 'int main() { return 0; }' > main.c
    $ x86_64-w64-mingw32-gcc main.c -o main.exe
    $ valgrind --trace-children=yes ../wine64_build/loader/wine64 ./main.exe

gives the attached output.  The first error appears to be an uninitialized read
to writev in request.c (even though it's hard to tell since valgrind is tracing
multiple threads).