Compiler warnings aren't displayed when compiling through eosfactory.build about eosfactory HOT 4 OPEN

@@ -139,7 +139,7 @@ error message:
139 139      if cwd:
140 140          shutil.rmtree(cwd)
141 141
142     -    if returncode:
    142 +    if returncode or stderr:
143 143        raise errors.Error('''
144 144   command line:
145 145   =============

ERROR:
command line:
=============
eosio-cpp -o /mnt/c/Workspaces/EOS/contracts/token/build/token.wasm -I=/mnt/c/Users/cartman/AppData/Local/Packages/CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc/LocalState/rootfs/usr/opt/eosio.cdt/1.6.1/include -I=/mnt/c/Users/cartman/AppData/Local/Packages/CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc/LocalState/rootfs/usr/opt/eosio.cdt/1.6.1/include/libcxx -I=/mnt/c/Users/cartman/AppData/Local/Packages/CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc/LocalState/rootfs/usr/opt/eosio.cdt/1.6.1/include/eosiolib/core -I=/mnt/c/Users/cartman/AppData/Local/Packages/CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc/LocalState/rootfs/usr/opt/eosio.cdt/1.6.1/include/eosiolib/contracts -I=/mnt/c/Workspaces/EOS/contracts/token -I=/mnt/c/Workspaces/EOS/contracts/token/include -abigen -R=/mnt/c/Workspaces/EOS/contracts/token/ricardian /mnt/c/Workspaces/EOS/contracts/token/src/token.cpp

error message:
==============
In file included from /tmp/token.cpp:6:
/mnt/c/Workspaces/EOS/contracts/token/include/token.hpp:23:72: warning: shift count >= width of type [-Wshift-count-overflow]
         uint128_t get_composite(name user) const { return (user.value << 64 || user.value);};
                                                                       ^  ~~
1 warning generated.

def long_process(command_line, build_dir=None, is_verbose=True, prompt=None, 
                                shell=False):
    stop = False
    PERIOD = 2

    def thread_function():
        if prompt:
            print("{}: ".format(prompt), end="", flush=True)
        while True:
            print(".", end="", flush=True)
            time.sleep(PERIOD)
            if stop:
                break

    cwd = None
    if build_dir:
        cwd = os.path.join(build_dir, "cwd")
        if os.path.exists(cwd):
            try:
                shutil.rmtree(cwd)
            except Exception as e:
                raise errors.Error("""
Cannot remove the directory {}.
error message:
==============
{}
                """.format(cwd, str(e)))
        os.mkdir(cwd)

    threading.Thread(target=thread_function).start()
    try:
        p = subprocess.run(
            command_line,
            cwd=cwd,
            shell=shell,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE)
    except Exception as e:
        stop = True
        time.sleep(PERIOD)
        print(str(e))
        exit()

    stop = True
    time.sleep(PERIOD)
    print()
    stdout = p.stdout.decode("ISO-8859-1")
    stderr = p.stderr.decode("ISO-8859-1")
    returncode = p.returncode

    if cwd:
        shutil.rmtree(cwd)

    if returncode:
        raise errors.Error("""
command line:
=============
{}

error message:
==============
{}
        """.format(" ".join(command_line), stderr))

    if is_verbose:
        print(stdout)
        print(stderr)

    return p