lcb_cntl LCB_CNTL_ENABLE_TRACING not disabling tracing

From debugging session I found following behaviour.

lcb_create creates a tracer per code in tracing.cc. 

if (settings->use_tracing) {
if (options && options->tracer)

{ settings->tracer = options->tracer; }

else

{ settings->tracer = lcbtrace_new(obj, LCBTRACE_F_THRESHOLD); }

}

Given settings->use_tracing seems to always be 1 this is always executed.

subsequent lcb_cntl call setting LCB_CNTL_ENABLE_TRACING to 0 just sets settings->use_tracing to 0 but does not touch settings->tracer which is tested for calling tracing code.