TCM versus TCM race conditoin

Hi,

This is regarding a race condition (happens at different seed) in one of my sim between 2 different TCMs.

 The scenario is something like this:

The test is implented as a subsequence which contains a do action in its body() @driver.clock {..., the driver.clock is connected to bfm clock as follows:

event a_clock is rise ('clk_from_vhd_tb') @sim;

on a_clock {emit driver.clock};

where driver is the one associated with original sequence.

 In bfm there is a TCM called execute_items()... which is started in its run() is also{... block.

The issue:

In few seeds it is seen that when execute_items() is started there is a garbage struct which is generated.

The bfm interaction mode is PULL_MODE. As per my understanding of get_next_item(), the call is blocked unless a "do" action is seen this avoiding any garbage struct generation.

Thanks in advance for any help.