Removes memory leak of ASTContext and TargetMachine. When DisableFree is turned on, it intentionally leaks these instances as they can be trivially deallocated. This patch turns this off and delete Parser instance early so that they will not reference dangling pargma headers. Asan shouldn't detect these as leaks normally, since burypointer is called for them. But, most likely, we have reached number of leaks exceeding kGraveYardMaxSize and they start to get reported.

Removes memory leak of ASTContext and TargetMachine. When DisableFree is turned on, it intentionally leaks these instances as they can be trivially deallocated. This patch turns this off and delete Parser instance early so that they will not reference dangling pargma headers. Asan shouldn't detect these as leaks normally, since burypointer is called for them. But, every invocation of incremental parser createa an additional leak of TargetMachine. If there are many invocations within a single test case, we easily reach number of leaks exceeding kGraveYardMaxSize (which is 12) and leaks start to get reported by asan buildbots.

Removes memory leak of ASTContext and TargetMachine. When DisableFree is turned on, it intentionally leaks these instances as they can be trivially deallocated. This patch turns this off and delete Parser instance early so that they will not reference dangling pargma headers. Asan shouldn't detect these as leaks normally, since burypointer is called for them. But, most likelyevery invocation of incremental parser createa an additional leak of TargetMachine. If there are many invocations within a single test case, we havewe easily reached number of leaks exceeding kGraveYardMaxSize (which is 12) and theyleaks start to get reportedd by asan buildbots.