| Issue |
149759
|
| Summary |
[analyzer] UNREACHABLE executed after saying "Support for this Decl not implemented."
|
| Labels |
clang:static analyzer,
crash
|
| Assignees |
|
| Reporter |
k-arrows
|
Reproducer:
https://godbolt.org/z/7T5eq5WPo
```cpp
template<int I, typename... Ts>
using Type = Ts...[I];
template<int I, auto... Ts>
constexpr auto Var = Ts...[I];
template <int I, auto...Ts>
int foo()
{
return Ts...[I];
}
void bar()
{
int r = foo<2, 0, 1, 42>();
}
```
Backtrace:
```console
Support for this Decl not implemented.
UNREACHABLE executed at /root/llvm-project/llvm/tools/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp:3337!
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 foo() at line 14
#1 Calling bar()
3. <source>:9:10: Error evaluating statement
4. <source>:9:10: Error evaluating statement
#0 0x0000000003fc1498 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fc1498)
#1 0x0000000003fbe8c4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fbe8c4)
#2 0x0000000003f03098 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007ded82e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007ded82e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007ded82e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007ded82e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000000003f0e85a (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f0e85a)
#8 0x0000000006523dc1 clang::ento::ExprEngine::VisitCommonDeclRefExpr(clang::Expr const*, clang::NamedDecl const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6523dc1)
#9 0x0000000006529801 clang::ento::ExprEngine::Visit(clang::Stmt const*, clang::ento::ExplodedNode*, clang::ento::ExplodedNodeSet&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6529801)
#10 0x000000000652bdcd clang::ento::ExprEngine::ProcessStmt(clang::Stmt const*, clang::ento::ExplodedNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x652bdcd)
#11 0x00000000064e0d0a clang::ento::CoreEngine::HandleBlockEntrance(clang::BlockEntrance const&, clang::ento::ExplodedNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e0d0a)
#12 0x00000000064e1282 clang::ento::CoreEngine::dispatchWorkItem(clang::ento::ExplodedNode*, clang::ProgramPoint, clang::ento::WorkListUnit const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e1282)
#13 0x00000000064e1611 clang::ento::CoreEngine::ExecuteWorkList(clang::LocationContext const*, unsigned int, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e1611)
#14 0x00000000060a8727 (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
#15 0x00000000060aa35e (anonymous namespace)::AnalysisConsumer::HandleDeclsCallGraph(unsigned int) AnalysisConsumer.cpp:0:0
#16 0x00000000060abd63 (anonymous namespace)::AnalysisConsumer::HandleTranslationUnit(clang::ASTContext&) AnalysisConsumer.cpp:0:0
#17 0x000000000666650c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x666650c)
#18 0x0000000004c64025 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c64025)
#19 0x0000000004be0e6e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4be0e6e)
#20 0x0000000004d57b01 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d57b01)
#21 0x0000000000d9ec4f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9ec4f)
#22 0x0000000000d9582a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#23 0x00000000049d7709 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
#24 0x0000000003f03534 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f03534)
#25 0x00000000049d7d1f 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
#26 0x0000000004999d6d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4999d6d)
#27 0x000000000499adfe 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+++0x499adfe)
#28 0x00000000049a3945 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49a3945)
#29 0x0000000000d9b0ff clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9b0ff)
#30 0x0000000000c4f5b4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc4f5b4)
#31 0x00007ded82e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#32 0x00007ded82e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#33 0x0000000000d952d5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd952d5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
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