Incorrectly using the non-thread safe error list between PDO and SDO tasks
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alex-brinkman commented
Turns out the ecx_pusherror and ecx_poperror are not thread safe.
ecx_pusherror is used within the SDO thread to add entries when SDO read and writes are encountered.
ecx_poperror is used within the primary JSD process and checked for emergency errors.
This vulnerability needs to be addressed ASAP without impacting the highly useful fetching of emergency codes.