[llvm-bugs] [Bug 28866] New: crash on invalid code n x86_64-linux-gnu (UNREACHABLE executed at /path/to/Expr.cpp:2832!)

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Aug 5 02:19:34 PDT 2016


https://llvm.org/bugs/show_bug.cgi?id=28866

            Bug ID: 28866
           Summary: crash on invalid code n x86_64-linux-gnu (UNREACHABLE
                    executed at /path/to/Expr.cpp:2832!)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chengniansun at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org
    Classification: Unclassified

$ clang-trunk -v
clang version 4.0.0 (trunk 277732)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.1.1
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$ clang-trunk small.C
small.C:4:28: error: use of undeclared identifier 'value'; did you mean
'false'?
  A(G) : _g(static_cast<G>(value)) {}
                           ^~~~~
                           false
small.C:4:28: error: address of overloaded function 'value' does not match
required type 'LC<int, 1, 0, 2, 1>'
  A(G) : _g(static_cast<G>(value)) {}
                           ^~~~~
small.C:8:39: note: in instantiation of member function 'A<LC<int, 1, 0, 2, 1>
&>::A' requested here
void fn1() { A<LC<int, 1, 0, 2, 1> &> a(b); }
                                      ^
shouldn't see dependent / unresolved nodes here
UNREACHABLE executed at
/tmp/llvm-builder/llvm-source-trunk/tools/clang/lib/AST/Expr.cpp:2832!
#0 0x0000000001b7d425 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang-4.0+0x1b7d425)
#1 0x0000000001b7b14e llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang-4.0+0x1b7b14e)
#2 0x0000000001b7b2b2 SignalHandler(int)
(/usr/local/clang-trunk/bin/clang-4.0+0x1b7b2b2)
#3 0x00007fe48b12aed0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10ed0)
#4 0x00007fe489cbf1c8 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x331c8)
#5 0x00007fe489cc064a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3464a)
#6 0x0000000001b2c850 LLVMInstallFatalErrorHandler
(/usr/local/clang-trunk/bin/clang-4.0+0x1b2c850)
#7 0x0000000003026400 clang::Expr::HasSideEffects(clang::ASTContext const&,
bool) const (/usr/local/clang-trunk/bin/clang-4.0+0x3026400)
#8 0x00000000030261b2 clang::Expr::HasSideEffects(clang::ASTContext const&,
bool) const (/usr/local/clang-trunk/bin/clang-4.0+0x30261b2)
#9 0x00000000028cccc8 (anonymous
namespace)::BaseAndFieldInfo::addFieldInitializer(clang::CXXCtorInitializer*)
[clone .constprop.4112] (/usr/local/clang-trunk/bin/clang-4.0+0x28cccc8)
#10 0x00000000028e7f0e CollectFieldInitializer(clang::Sema&, (anonymous
namespace)::BaseAndFieldInfo&, clang::FieldDecl*, clang::IndirectFieldDecl*)
[clone .constprop.4107] (/usr/local/clang-trunk/bin/clang-4.0+0x28e7f0e)
#11 0x00000000028f7d9c
clang::Sema::SetCtorInitializers(clang::CXXConstructorDecl*, bool,
llvm::ArrayRef<clang::CXXCtorInitializer*>)
(/usr/local/clang-trunk/bin/clang-4.0+0x28f7d9c)
#12 0x00000000028f8de4 clang::Sema::ActOnMemInitializers(clang::Decl*,
clang::SourceLocation, llvm::ArrayRef<clang::CXXCtorInitializer*>, bool)
(/usr/local/clang-trunk/bin/clang-4.0+0x28f8de4)
#13 0x0000000002bca97f
clang::Sema::InstantiateMemInitializers(clang::CXXConstructorDecl*,
clang::CXXConstructorDecl const*, clang::MultiLevelTemplateArgumentList const&)
(/usr/local/clang-trunk/bin/clang-4.0+0x2bca97f)
#14 0x0000000002bcedc5
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool, bool)
(/usr/local/clang-trunk/bin/clang-4.0+0x2bcedc5)
#15 0x0000000002bcdadb clang::Sema::PerformPendingInstantiations(bool)
(/usr/local/clang-trunk/bin/clang-4.0+0x2bcdadb)
#16 0x00000000027dca62 clang::Sema::ActOnEndOfTranslationUnit()
(/usr/local/clang-trunk/bin/clang-4.0+0x27dca62)
#17 0x00000000025fb605
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/local/clang-trunk/bin/clang-4.0+0x25fb605)
#18 0x00000000025f0d0b clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang-4.0+0x25f0d0b)
#19 0x00000000022d9667 clang::CodeGenAction::ExecuteAction()
(/usr/local/clang-trunk/bin/clang-4.0+0x22d9667)
#20 0x0000000001fff7a6 clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang-4.0+0x1fff7a6)
#21 0x0000000001fd3836
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang-4.0+0x1fd3836)
#22 0x0000000002083f47
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang-4.0+0x2083f47)
#23 0x0000000000941778 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/clang-trunk/bin/clang-4.0+0x941778)
#24 0x00000000008deb60 main (/usr/local/clang-trunk/bin/clang-4.0+0x8deb60)
#25 0x00007fe489cac730 __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x20730)
#26 0x000000000093dff9 _start (/usr/local/clang-trunk/bin/clang-4.0+0x93dff9)
Stack dump:
0.    Program arguments: /usr/local/clang-trunk/bin/clang-4.0 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
small.C -mrelocation-model static -mthread-model posix -mdisable-fp-elim
-fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables
-fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb
-resource-dir /usr/local/clang-trunk/bin/../lib/clang/4.0.0 -c-isystem .
-c-isystem /usr/local/include/csmith -internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1/../../../../include/c++/6.1.1
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1/../../../../include/x86_64-linux-gnu/c++/6.1.1
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1/../../../../include/x86_64-linux-gnu/c++/6.1.1
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1/../../../../include/c++/6.1.1/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/4.0.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -fdeprecated-macro
-fdebug-compilation-dir
/home/cnsun/workspace/meta-compiler/error-fuzzer/exp-runs/crash/20160729-clang++-trunk--O3-c-Weverything-std=c++14-build-210015
-ferror-limit 19 -fmessage-length 135 -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o
/tmp/small-ec0a17.o -x c++ small.C
1.    <eof> parser at end of file
2.    small.C:4:3: instantiating function definition 'A<LC<int, 1, 0, 2, 1>
&>::A'
clang-4.0: error: unable to execute command: Aborted
clang-4.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 4.0.0 (trunk 277732)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-4.0: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang-4.0: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-4.0: note: diagnostic msg: /tmp/small-10b7ef.cpp
clang-4.0: note: diagnostic msg: /tmp/small-10b7ef.sh
clang-4.0: note: diagnostic msg:

********************
$ cat small.C
template <class, int, int, int, int> class LC {};
template <class G> class A {
public:
  A(G) : _g(static_cast<G>(value)) {}
  G _g;
};
LC<int, 1, 0, 2, 1> b;
void fn1() { A<LC<int, 1, 0, 2, 1> &> a(b); }
$

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