dir=clang-bug-406505209
log="use of overloaded operator '=' is ambiguous"
export EXTRA_CFLAGS='-Xclang -fallow-pcm-with-compiler-errors -ferror-limit=0'
make clean -C "$dir"
export CLANG=~/clang-bug-406505209.compiler/bin/clang
OUT1=$(make -k -C "$dir" 2>&1)
OUT2=
if echo "$OUT1" | grep "$log"; then
    export CLANG=~/clang-bug-406505209.compiler-stable/bin/clang
    make clean -C "$dir"
    OUT2=$(make -k -C "$dir" 2>&1)
    if echo "$OUT2" | grep "$log"; then
        echo "LOG SEEN ON STABLE COMPILER"
        exit 1
    fi
    echo "*** OUTPUT FROM CUSTOM COMPILER ***"
    echo "$OUT1"
    echo "*** OUTPUT FROM STABLE COMPILER ***"
    echo "$OUT2"
    echo SUCCESS
    exit 0
fi
echo "NO EXPECTED LOG"
exit 1