1. A method, comprising: by a debugging module: determining, by analysis of code build information of a system with an identified error, where to set a debug entry point at which to start execution of the system during a program subset debug session; and capturing, in association with a subsequent execution of the system, debug entry point metadata for the program subset debug session comprising an initial file state of at least one file accessed by the system, any file inputs and file outputs (I/Os) detected as being performed by the system during the subsequent execution of the system up to the debug entry point, and an image of all instantiated objects of the system at the debug entry point.