1. A method of integrating compiler warnings into a debug session, the method comprising: receiving, by a debugger for a debug session of a debuggee from a compiler, compiled source code for execution and compiler warning data describing one or more compiler warnings generated at compile time of the debuggee, each compiler warning resulting from a source code variable statement in the debuggee source code; receiving, by the debugger, a request to evaluate a variable; determining, from the compiler warning data, whether evaluating the variable is dependent upon a source code variable statement resulting in a compiler warning; and if evaluating the variable is dependent upon a source code variable statement resulting in a compiler warning, returning, by the debugger responsive to the request along with a result of the evaluation, a compiler warning indicator.