32 lines · cpp
1// RUN: %clang_analyze_cc1 -std=c++14 -w -analyzer-checker=core,cplusplus -analyzer-output=text -verify %s2 3namespace no_crash_on_delete_dtor {4// We were crashing when producing diagnostics for this code, but not for the5// report that it currently emits. Instead, Static Analyzer was thinking that6// p.get()->foo() is a null dereference because it was dropping7// constraints over x too early and took a different branch next time8// we call .get().9struct S {10 void foo();11 ~S();12};13 14struct smart_ptr {15 int x;16 S *s;17 smart_ptr(S *);18 S *get() {19 return (x || 0) ? nullptr : s; // expected-note{{Field 'x' is 0}}20 // expected-note@-1{{Left side of '||' is false}}21 // expected-note@-2{{'?' condition is false}}22 // expected-warning@-3{{Use of memory after it is released}}23 // expected-note@-4{{Use of memory after it is released}}24 }25};26 27void bar(smart_ptr p) {28 delete p.get(); // expected-note{{Memory is released}}29 p.get()->foo(); // expected-note{{Calling 'smart_ptr::get'}}30}31} // namespace no_crash_on_delete_dtor32