<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/150245>150245</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [analyzer] Assertion `!HasRefTypeParam || isa<Loc>(*DV)' failed.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang:static analyzer,
            crash
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          k-arrows
      </td>
    </tr>
</table>

<pre>
    Reproducer:
https://godbolt.org/z/qb616xEKf
```cpp
class A {
public:
  void f();
};

void A::f() {}

void h(void) {
  void *Af = __builtin_function_start(&A::f);
}
```

Backtrace:
```console
clang++: /root/llvm-project/llvm/tools/clang/lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp:140: void {anonymous}::NonNullParamChecker::checkPreCall(const clang::ento::CallEvent&, clang::ento::CheckerContext&) const: Assertion `!HasRefTypeParam || isa<Loc>(*DV)' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics --analyze <source>
1.      <eof> parser at end of file
2.      While analyzing stack: 
        #0 Calling h()
3.      <source>:9:14: Error evaluating statement
4.      <source>:9:14: Error evaluating statement
 #0 0x0000000003fc9168 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fc9168)
 #1 0x0000000003fc6594 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fc6594)
 #2 0x0000000003f0ad68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x0000728caf042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000728caf0969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x0000728caf042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x0000728caf0287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000728caf02871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x0000728caf039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x00000000062991b3 (anonymous namespace)::NonNullParamChecker::checkPreCall(clang::ento::CallEvent const&, clang::ento::CheckerContext&) const NonNullParamChecker.cpp:0:0
#10 0x00000000064dd1a0 void expandGraphWithCheckers<(anonymous namespace)::CheckCallContext>((anonymous namespace)::CheckCallContext, clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNodeSet const&) CheckerManager.cpp:0:0
#11 0x00000000064dd3d9 clang::ento::CheckerManager::runCheckersForCallEvent(bool, clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNodeSet const&, clang::ento::CallEvent const&, clang::ento::ExprEngine&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64dd3d9)
#12 0x00000000065594f4 clang::ento::ExprEngine::evalCall(clang::ento::ExplodedNodeSet&, clang::ento::ExplodedNode*, clang::ento::CallEvent const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65594f4)
#13 0x000000000655a507 clang::ento::ExprEngine::VisitCallExpr(clang::CallExpr const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x655a507)
#14 0x0000000006531e21 clang::ento::ExprEngine::Visit(clang::Stmt const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6531e21)
#15 0x0000000006532e7d clang::ento::ExprEngine::ProcessStmt(clang::Stmt const*, clang::ento::ExplodedNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6532e7d)
#16 0x00000000064e7c6b clang::ento::CoreEngine::HandlePostStmt(clang::CFGBlock const*, unsigned int, clang::ento::ExplodedNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e7c6b)
#17 0x00000000064e8358 clang::ento::CoreEngine::dispatchWorkItem(clang::ento::ExplodedNode*, clang::ProgramPoint, clang::ento::WorkListUnit const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e8358)
#18 0x00000000064e86c1 clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*, unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e86c1)
#19 0x00000000060af7d7 (anonymous namespace)::AnalysisConsumer::HandleCode(clang::Decl*, unsigned int, clang::ento::ExprEngine::InliningModes, llvm::DenseSet<clang::Decl const*, llvm::DenseMapInfo<clang::Decl const*, void>>*) AnalysisConsumer.cpp:0:0
#20 0x00000000060b140e (anonymous namespace)::AnalysisConsumer::HandleDeclsCallGraph(unsigned int) AnalysisConsumer.cpp:0:0
#21 0x00000000060b2e13 (anonymous namespace)::AnalysisConsumer::HandleTranslationUnit(clang::ASTContext&) AnalysisConsumer.cpp:0:0
#22 0x000000000666d5bc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x666d5bc)
#23 0x0000000004c69e45 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c69e45)
#24 0x0000000004be6b3e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4be6b3e)
#25 0x0000000004d5db71 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d5db71)
#26 0x0000000000d9fd9f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9fd9f)
#27 0x0000000000d969fa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#28 0x00000000049de109 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#29 0x0000000003f0b204 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f0b204)
#30 0x00000000049de71f clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#31 0x00000000049a0ced clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49a0ced)
#32 0x00000000049a1d7e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49a1d7e)
#33 0x00000000049a9de5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49a9de5)
#34 0x0000000000d9c24f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9c24f)
#35 0x0000000000c50784 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc50784)
#36 0x0000728caf029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#37 0x0000728caf029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#38 0x0000000000d964a5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd964a5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzkWl9z4ygS_zTkhZJLQv-shzwojr07e7N7qcnc7qMLIWRzwaADlHH2018BcvQncSaZS_bq6qYyVbKA7l__6G4aBNaa7QSllyC9Aun1Be7MXqrLuwArJb_pi0rWD5dfaKtk3RGqQFyCsNwb02r7iDYAbXayriQ3C6l2AG3-BGjzryqLsuP6bw0IS5CF_o-0LQhLwrHWsIQgvwJh2XYVZ8QLhfBesho2AC0BKkBs20F-3T-EpWstbd-47Ds5Kfn1qH0P0NI-nBofxQJUlg0E8TXcbquOccPEtukEMUyKrTZYGScyGxSMIIys8LquMLkzChPqoQ82SqElp95OsQPoyv7FJQRoo6Q0AG04vz8ErZL_pOT0E6CNkZJrgDb9sA1nFUCbW4MNI6XA_OFPqgDarPaU3FFle_4mxW8d5zdY4UP_emEpjssoCa1Kb3Z-hYUUDwfZaUemNe6Zob6B2B83iq4w5wAtrTUGekiunQoj_ZPtsb6nwgCUAbQ608nLXklh6NH3LKATavGVWlNl6YeWOxT9jPUX2nx9aKkDBkG-AvkKMo1BvPosCYjXborK69_t5KAcNphxWi9AWN58Xpe3a6i76sAMxLDqdlDRVioDjYQzd2Vm31ULIg8D_bNJYVp31JIMsaghE4R3NYVmTyFRWO9h9Tj9aAVbZaODUK1pDbXslH9tR2KtJWHY0BqqTkBNFGuNxXtrMLmDdXdovQOFCxAWN0rurOFY7boDFUb3jiNbi4nIQ8s4VQE9tlwq5w6O9QCfiNSBUZ24A2hTMTE4k_VBGOzqb1g1QQKDHQyklYvb1krvTNuZhYbBwbIAg-C4zAKsD4F-EAYfQXzNhKEcBo2QwT1VldTUtsPgFgbBjpDAOi_ZYyZAfP0iXttZC9zqvTQwaIjkUgU1wzshtWFEex2O4-nrAPsYgCBe9RTHaxCWkeUNxCsqGxCvYYuVpgpiA6mooWxgw1wwItvtjz3jFHpBTOygtnPgKLYhXQAUh9C6tW3b90koLONew6A1LgsXZHboWimpIL3HvMOmF2qonTwQlsmPD4UOTXgMT__ihhRRtoTOX11w6QftH24UE8Y51Ffvksuhk8LftlIbRfGhD1RmQ7aAzr538SyArsJjD89TZsFHM_BZWiTPgV9xikXX_l3csp3ANul0wi1INeTSqvgIqBbMABVNoYa4zpZwZX3wCyXynqoHj-1nLGpuNS57Did9-iTXp-DQ_ffy415-jpYEN2GCUhT2Rvksf1xm2ywJOBPdMdiJzjeQhZaLzEF2QwbAyVRgkRUNga3ZK4rr7R3j_G3S3fhBejqHm-QZ3GlHwVthJ3k2CM6mgtEyb2KIK5uj3yTWDRzE5k_ERtWbBUbVIHA5FRgXtMjeJtANGQQWYwfLUFFEVWwFPi7MUOAD1a0L3uKNS_SLi3O_2P7QEg3PFxgn77ZxPslSWVLXEQ596UGPLRb1Twq3-z-Y2T-WLvHqO7a7ntaGE6p-4X_boHMWr23mqGn9m6zpLX2RnFnXEZsF7M35FQu8e5aYaE5MXBcvzkEvqk_cnTgRtpFqVG0tKyn5xxp3zlVe71XrY6vWYscE7Xt50O-ey3tafahZ0ie5PEvTImmS70L0LfeYvxRTP8gsQOWbCH1_ijwJA0XxjCKchvnrKPqdaWYc6GOrpjyd3p4sOW_0a8l5ju-PIMeaP5CTTMmJI4qiN5AzJeXWHMz_HCHO5IGQdEYIonn9OkJu_J7IkvAutHyErdaawdZsmrFpTrLqTORKRce2-tLwRmrz1NzV5qcrLsndxOTHIteVkv89CryRAwX5jIJlnC5fR0HNdIsN2f8h1d0nQw-vyaNP57_fAt_Il3ixKj4zbf4h2MemTm__wM5yzk5GzmSHOTvrIyWdoSfkU3I-S4Itnr5yedFRhi3UJ2FUp9k9_UKblTA3RoF49SyYntRbu788Hb-sP4ivjIySx7TwDXGT1_n3Cl932KWZXkmhu8OpHPIBtnI-M6bumhL-xpCaJKlPgjPBxO5XWVM95feaCu0S7YRVq3AyQbMBv-L2k2jkdwa5E8p47abBxfXc6qf1JJoW2mEVJSH9T8i0oLRdt12FPt5499vbV2CKZpgQjb67s3kJ01eFheYuGGxwT-e6vP063aa8AuC0HsyyOq3IJN9gpWl5-3W2QtEDnhSuH1fAekiPIYMm1VlCsoIm6RjwRlkKRF26g-tJcjkdib8vwh7DgHBSIiUVzaqYjhGuep2fhDZYkGkC7GFP2J6Z9CGpvMc5WDGpa5I6rat8ksp7vIMx932Sni3uc2M_ZJnu8Q3oJ5VKWBdNXTSQkGh7wFbA6ACwVAo_fKGNTUh7PKrPbepZwem7U2b6ECM8ysGGfGZDVjQYnmhfRV9dwI0suT1gzn-nxEj16dDyZw3KphnZypgtqs65asXun00XkwU-KWoahYU_zBiEPn40Uo7V_uOS_2S17s9oMOcVJnfbRkwXAq-4d51VtJKHAxb1PIqfnT1t-n6ytdqxJWBEjlFM7FzPdT-1jwO2W3I8RpH_UWHNyFa77j2Fk872xdYozIw-Nc_EYc5tKEg1au_XsVOaLMffedx3l5zjQ1VjgPKBKrQ8nfD-IqtnJqOYnctWKBwfIT93-upbvnTiFjeUP0y4fHnePuKc2SF-dPjpeb51rjxq4P-zc1jGFy1WZhGe9YLph4SkwCGh9VnW3KzhJyvjicpJ6p4NtB3OHWy90LWcHXA9Gvau-d-bPbgSmpES1Tl9Kym_yEqfZ-QXWdmNyoSRl3Lxowe0mNnJf1qEv0hi7yZ_CZWWrIHKeEZlUdP0HOzr0fOkQHimMjg3BX8hle9fh3h6BvKS2RpOUNKntFMlcgLvUkn5ZM90boV-99rDIhtwT6q_kKRhvkygRfzeir3oQfH8G1hRF2_8FuiGDALnX78KmoRwu7Vj_K2W7cisV6ugyUjFcl6oJTiFXvj7z5MV7lXPLtBQpeyqUnr3gk2_aYCk939_FwR-Y2YP6dEdDNUURnFiMXaawuAeGgk1pZCNinmr6VTEQ0VNpwS14WdHji_2XNSXcV3EBb6gl1GexmiZZmF6sb_MaEzirKgRQU2BQoqKGMfLAtU4xcsEkQt2iUKUhjmKozTJknSR5hFuUNOgLCVhUVUgCekBM76wYbGQanfhrp9cRmmIkvSC44py7a5nIXRKAtpdDOovM1imEUAr226LIvsrvb5Ql-5WS9XtNEhCzrTRgwrDDHd3vh5FpNfvdyPnolP88sdv3fSW31-ifwcAAP__oXLXOg">