invoke set_tag from lua core in jaegertracing::Span::SetTag(opentracing::v2::string_view, opentracing::v2::Value const&) ()

[dengguojie]

(gdb) bt
#0 0x00007f62e0aa2dc9 in __memcpy_ssse3_back () from /lib64/libc.so.6
#1 0x00007f62db5ae12a in void std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_construct<char*>(char*, char*, std::forward_iterator_tag) [clone .isra.210] () from /home/xx/dispatcher/nginx/lualib/libjaegertracing_plugin.linux_amd64.so
#2 0x00007f62db5b11af in opentracing::v2::Value::Value(opentracing::v2::Value const&) () from /home/xx/dispatcher/nginx/lualib/libjaegertracing_plugin.linux_amd64.so
#3 0x00007f62db5b2321 in jaegertracing::Span::SetTag(opentracing::v2::string_view, opentracing::v2::Value const&) ()
from /home/xx/dispatcher/nginx/lualib/libjaegertracing_plugin.linux_amd64.so
#4 0x00007f62dbf2eb2b in lua_bridge_tracer::(anonymous namespace)::DynamicSpan::SetTag(opentracing::v2::string_view, opentracing::v2::Value const&) ()
from /home/xx/dispatcher/nginx/lualib/opentracing_bridge_tracer.so
#5 0x00007f62dbf38745 in lua_bridge_tracer::LuaSpan::set_tag(lua_State*) () from /home/xx/dispatcher/nginx/lualib/opentracing_bridge_tracer.so
#6 0x00007f62e1b538fe in lj_BC_FUNCC () from /home/xx/dispatcher/nginx/sbin/../../luajit/lib/libluajit-5.1.so.2

[isaachier]

I'm going to guess this is an issue of using a string_view improperly from lua.

[dengguojie]

But #2 stack shows the opentracing::Value where i guess is:
template
Tag(const std::string& key, ValueArg&& value)
: _key(key)
, _value(std::forward(value))
{
}
in https://github.com/jaegertracing/jaeger-client-cpp/blob/master/src/jaegertracing/Tag.h

[dengguojie]

when i call like
span:set_tag("span.kind", 'client') --string
it will core
But
span:set_tag("span.kind", 12345) --number
it will be OK

[isaachier]

Either way, it is an issue in the Lua tracer or an issue in the Value move constructor defined in opentracing-cpp. This should not be a Jaeger issue. Sorry I am not sure on the details to help more here.