[llvm-bugs] [Bug 43356] New: SegFault optimizing C++17 aggregate initialization with inheritance.

Wed Sep 18 17:54:40 PDT 2019

https://bugs.llvm.org/show_bug.cgi?id=43356

            Bug ID: 43356
           Summary: SegFault optimizing C++17 aggregate initialization
                    with inheritance.
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++17
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hendrik.skubch at gmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Created attachment 22522
  --> https://bugs.llvm.org/attachment.cgi?id=22522&action=edit
Source code causing segfault

Clang++ reliably crashes when compiling the attached source.
Expected outcome: successful compilation.

user at machine:~$  /usr/bin/clang++-8  -std=c++17 -O1 clang-crash.cpp
Stack dump:
0.      Program arguments: /usr/lib/llvm-8/bin/clang -cc1 -triple
x86_64-pc-linux-gnu -emit-obj -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name clang-crash.cpp -mrelocation-model static
-mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info
-debugger-tuning=gdb -momit-leaf-frame-pointer -resource-dir
/usr/lib/llvm-8/lib/clang/8.0.0 -internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0
-internal-isystem
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0/backward
-internal-isystem /usr/include/clang/8.0.0/include/ -internal-isystem
/usr/local/include -internal-isystem /usr/lib/llvm-8/lib/clang/8.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O1
-std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/hendrik
-ferror-limit 19 -fmessage-length 211 -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o
/tmp/clang-crash-da01be.o -x c++ clang-crash.cpp -faddrsig 
1.      <eof> parser at end of file
2.      Per-function optimization
3.      Running pass 'SROA' on function '@_Z1fv'
 #0 0x00007f99a776c4bf llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x9724bf)
 #1 0x00007f99a776a910 llvm::sys::RunSignalHandlers()
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x970910)
 #2 0x00007f99a776c8c8 (/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x9728c8)
 #3 0x00007f99aaa59890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
 #4 0x00007f99a77b51b0 llvm::BasicBlock::getModule() const
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x9bb1b0)
 #5 0x00007f99a81a0166 (/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x13a6166)
 #6 0x00007f99a818a8a3 (/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x13908a3)
 #7 0x00007f99a818a4d0 (/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x13904d0)
 #8 0x00007f99a8193559 llvm::SROA::runOnAlloca(llvm::AllocaInst&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x1399559)
 #9 0x00007f99a8194755 llvm::SROA::runImpl(llvm::Function&,
llvm::DominatorTree&, llvm::AssumptionCache&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x139a755)
#10 0x00007f99a819f9b3 (/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0x13a59b3)
#11 0x00007f99a785f7f0 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0xa657f0)
#12 0x00007f99a785ef2e
llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0xa64f2e)
#13 0x00007f99a785eec0 llvm::legacy::FunctionPassManager::run(llvm::Function&)
(/usr/lib/x86_64-linux-gnu/libLLVM-8.so.1+0xa64ec0)
#14 0x00000000006dc072 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/usr/lib/llvm-8/bin/clang+0x6dc072)
#15 0x0000000000d58b0f (/usr/lib/llvm-8/bin/clang+0xd58b0f)
#16 0x00000000011df3c3 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/lib/llvm-8/bin/clang+0x11df3c3)
#17 0x0000000000addfcf clang::FrontendAction::Execute()
(/usr/lib/llvm-8/bin/clang+0xaddfcf)
#18 0x0000000000a9bb18
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/lib/llvm-8/bin/clang+0xa9bb18)
#19 0x0000000000b644c6
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/lib/llvm-8/bin/clang+0xb644c6)
#20 0x00000000006a32e7 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/lib/llvm-8/bin/clang+0x6a32e7)
#21 0x00000000006a17d6 main (/usr/lib/llvm-8/bin/clang+0x6a17d6)
#22 0x00007f99a60ebb97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#23 0x000000000069eeca _start (/usr/lib/llvm-8/bin/clang+0x69eeca)
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 8.0.0-3~ubuntu18.04.1 (tags/RELEASE_800/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/clang-crash-d106dc.cpp
clang: note: diagnostic msg: /tmp/clang-crash-d106dc.sh
clang: note: diagnostic msg: 

********************

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