Techniques are described for preventing customers from receiving faulty code. The techniques involve adding marker code to potentially problematic code portions that are not to be included in a final version of the code. The marker code may include a reference date, such as a first date of testing of the code. Before the reference date, various scanning and/or searching tools may be used to determine a presence of the marker code within the code. Moreover, after this reference date, during running of the code, the marker code may cause immediate and program-wide cessation of the code, and provide a message as to why the cessation has occurred. In this way, the problematic code portion(s) will not be passed to a large number of customers.

 
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