Error protection for pipeline resources

A method, comprising:

• setting a first indicator to indicate that a pipeline resource of a data processor is assigned to a first instruction;
• setting a second indicator in response to detecting a first write to the pipeline resource;
• and
• indicating an error in response to detecting a second write to the pipeline resource while the first indicator and the second indicator are set.

A data processor comprising:

• an instruction pipeline having a plurality of pipeline resources;
• a plurality of indicators, each of the plurality of indicators to indicate whether a corresponding one of the plurality of pipeline resources is assigned to an instruction at the instruction pipeline so that the one of the plurality of pipeline resources is temporarily uniquely assigned to the instruction during the execution of the instruction;
• and
• the instruction pipeline to indicate an error in response to determining a first instruction has accessed one of the plurality of pipeline resources when the one of the plurality of pipeline resources is assigned to a second instruction based on the plurality of indicators.