stacktrace

# 0  ?? at hhvm:0
# 1  killpg at /lib64/libc.so.6:0
# 2  __dynamic_cast at /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/libstdc++.so.6:0
# 3  HPHP::MySQL* HPHP::Resource::getTyped<HPHP::MySQL>(bool, bool) const at hhvm:0
# 4  HPHP::MySQL::Get(HPHP::Variant const&) at hhvm:0
# 5  HPHP::MySQL::GetConn(HPHP::Variant const&, HPHP::MySQL**) at hhvm:0
# 6  HPHP::php_mysql_do_query(HPHP::String const&, HPHP::Variant const&, bool) at hhvm:0
# 7  HPHP::php_mysql_do_query_and_get_result(HPHP::String const&, HPHP::Variant const&, bool, bool) at hhvm:0
# 8  ?? at hhvm:0
# 9  HPHP::JIT::MCGenerator::enterTC(unsigned char*, void*) at hhvm:0
# 10 HPHP::ExecutionContext::enterVM(HPHP::ActRec*, unsigned char const*, HPHP::ObjectData*) at hhvm:0
# 11 HPHP::ExecutionContext::invokeFunc(HPHP::TypedValue*, HPHP::Func const*, HPHP::Variant const&, HPHP::ObjectData*, HPHP::Class*, HPHP::VarEnv*, HPHP::StringData*, HPHP::ExecutionContext::InvokeFlags) at hhvm:0
# 12 HPHP::ExecutionContext::invokeUnit(HPHP::TypedValue*, HPHP::Unit*) at hhvm:0
# 13 HPHP::invoke_file(HPHP::String const&, bool, char const*) at hhvm:0
# 14 HPHP::include_impl_invoke(HPHP::String const&, bool, char const*) at hhvm:0
# 15 HPHP::hphp_invoke(HPHP::ExecutionContext*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, HPHP::Array const&, HPHP::VRefParamValue const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, bool, bool, bool) at hhvm:0
# 16 HPHP::hphp_invoke_simple(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool) at hhvm:0
# 17 ?? at hhvm:0
# 18 HPHP::execute_program(int, char**) at hhvm:0
# 19 main at hhvm:0
# 20 __libc_start_main at /lib64/libc.so.6:0
# 21 ?? at hhvm:0