[llvm-bugs] [Bug 34460] New: Assertion failure in clang::ento::SVal::castAs

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34460

            Bug ID: 34460
           Summary: Assertion failure in clang::ento::SVal::castAs
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Static Analyzer
          Assignee: ganna at apple.com
          Reporter: alexfh at google.com
                CC: llvm-bugs at lists.llvm.org

$ cat castAs-crash.cc
void mempcpy(void *, void *, long);
short a;
class b {
  int c;
  long g;
  void d() {
    int e = c;
    f += e;
    mempcpy(f, &a, g);
  }
  unsigned *f;
};
$ clang-tidy -checks=-*,clang-analyzer-unix.cstring*  castAs-crash.cc --
-std=c++11
assert.h assertion failed at
llvm/tools/clang/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h:93 in
T clang::ento::SVal::castAs() const [T = clang::ento::loc::MemRegionVal]:
T::isKind(*this)
    @          0x544749a  __assert_fail
    @          0x2839e1a  clang::ento::SVal::castAs<>()
    @          0x2cdecd5  (anonymous
namespace)::CStringChecker::evalCopyCommon()
    @          0x2cdc59e  (anonymous namespace)::CStringChecker::evalMempcpy()
    @          0x2cdc384  (anonymous namespace)::CStringChecker::evalCall()
    @          0x2cdb140  clang::ento::eval::Call::_evalCall<>()
    @          0x2dfb722  clang::ento::CheckerFn<>::operator()()
    @          0x2df879a  clang::ento::CheckerManager::runCheckersForEvalCall()
    @          0x2e5a2d9  clang::ento::ExprEngine::evalCall()
    @          0x2e5a19b  clang::ento::ExprEngine::VisitCallExpr()
    @          0x2e12f24  clang::ento::ExprEngine::Visit()
    @          0x2e0fe44  clang::ento::ExprEngine::ProcessStmt()
    @          0x2e0faca  clang::ento::ExprEngine::processCFGElement()
    @          0x2e3dc66  clang::ento::CoreEngine::HandlePostStmt()
    @          0x2e3d566  clang::ento::CoreEngine::dispatchWorkItem()
    @          0x2e3d0a8  clang::ento::CoreEngine::ExecuteWorkList()
    @          0x2138e05  clang::ento::ExprEngine::ExecuteWorkList()
    @          0x20e1802  (anonymous
namespace)::AnalysisConsumer::ActionExprEngine()
    @          0x20e15c1  (anonymous
namespace)::AnalysisConsumer::RunPathSensitiveChecks()
    @          0x20e1285  (anonymous namespace)::AnalysisConsumer::HandleCode()
    @          0x20d4963  (anonymous
namespace)::AnalysisConsumer::HandleDeclsCallGraph()
    @          0x20d2be7  (anonymous
namespace)::AnalysisConsumer::HandleTranslationUnit()
    @          0x25136ce  clang::MultiplexConsumer::HandleTranslationUnit()
    @          0x2f59506  clang::ParseAST()
    @          0x250109a  clang::ASTFrontendAction::ExecuteAction()
    @          0x2500b30  clang::FrontendAction::Execute()
    @          0x23192c2  clang::CompilerInstance::ExecuteAction()
    @          0x21eac92 
clang::tooling::FrontendActionFactory::runInvocation()
    @          0x21eab33  clang::tooling::ToolInvocation::runInvocation()

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