Your message dated Fri, 14 Oct 2016 11:53:16 +0000
with message-id <e1bv136-000448...@franck.debian.org>
and subject line Bug#836604: Removed package(s) from unstable
has caused the Debian Bug report #794475,
regarding clang segfaults on failed parameter substitution in
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
794475: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=794475
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: clang-3.6
Version: 1:3.6.2~+rc1-1~exp1
Severity: normal

Dear Maintainer,

I managed to make clang-3.6 segfault on a piece of code that should not compile,
as it comprises the invalid use of a non-static data member.

This also applies to clang-3.5.

The crash is 100% reproducible and also affects clang-3.5 (1:3.5.2-1) but 
appears
to be fixed in clang-3.7 (1:3.7~svn239806-1+b1). It affects clang-3.6 both from
unstable (1:3.6.1-1) and experimental (1:3.6.2~+rc1-1~exp1).

Unfortunately I have not been able to isolate what causes the crash or to
produce a minimal example, and I can't share the original code (yet -- it's
unpublished research).

crash backtrace:


OMPI_CXX=clang++-3.6 mpic++ -std=c++11 -Wall -Wextra -Werror 
-I/opt/intel/composer_xe_2015.2.164/mkl/include  -Ofast -g -flto -DNDEBUG -o 
mostfreq mostfreq.cpp /usr/lib/x86_64-linux-gnu/libgsl.a libboost_mpi.a 
libboost_serialization.a 
/opt/intel/composer_xe_2015.2.164/mkl/lib/intel64/libmkl_intel_lp64.a 
/opt/intel/composer_xe_2015.2.164/mkl/lib/intel64/libmkl_core.a 
/opt/intel/composer_xe_2015.2.164/mkl/lib/intel64/libmkl_sequential.a -ldl
In file included from mostfreq.cpp:13:
../worker_ec.h:178:48: error: invalid use of non-static data member 'k'
    std::vector<element> select_dht(int rank = k) {
                                               ^
../worker_ec.h:178:41: error: unused parameter 'rank' 
[-Werror,-Wunused-parameter]
    std::vector<element> select_dht(int rank = k) {
                                        ^
#0 0x7f991806d3a2 llvm::sys::PrintStackTrace(_IO_FILE*) 
(/usr/lib/x86_64-linux-gnu/libLLVM-3.6.so.1+0xf943a2)
#1 0x7f991806baf1 (/usr/lib/x86_64-linux-gnu/libLLVM-3.6.so.1+0xf92af1)
#2 0x7f9916cb08d0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0xf8d0)
#3 0xb62721 (/usr/lib/llvm-3.6/bin/clang+0xb62721)
#4 0xb62b35 (/usr/lib/llvm-3.6/bin/clang+0xb62b35)
#5 0xb630f2 clang::Sema::CheckCompletedExpr(clang::Expr*, 
clang::SourceLocation, bool) (/usr/lib/llvm-3.6/bin/clang+0xb630f2)
#6 0xc96118 clang::Sema::BuildCXXDefaultArgExpr(clang::SourceLocation, 
clang::FunctionDecl*, clang::ParmVarDecl*) 
(/usr/lib/llvm-3.6/bin/clang+0xc96118)
#7 0xc9646c clang::Sema::GatherArgumentsForCall(clang::SourceLocation, 
clang::FunctionDecl*, clang::FunctionProtoType const*, unsigned int, 
llvm::ArrayRef<clang::Expr*>, llvm::SmallVectorImpl<clang::Expr*>&, 
clang::Sema::VariadicCallType, bool, bool) 
(/usr/lib/llvm-3.6/bin/clang+0xc9646c)
#8 0xc97302 clang::Sema::ConvertArgumentsForCall(clang::CallExpr*, 
clang::Expr*, clang::FunctionDecl*, clang::FunctionProtoType const*, 
llvm::ArrayRef<clang::Expr*>, clang::SourceLocation, bool) 
(/usr/lib/llvm-3.6/bin/clang+0xc97302)
#9 0xd852d9 clang::Sema::BuildCallToMemberFunction(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation) (/usr/lib/llvm-3.6/bin/clang+0xd852d9)
#10 0xc98c79 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, 
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, 
clang::SourceLocation, clang::Expr*, bool) 
(/usr/lib/llvm-3.6/bin/clang+0xc98c79)
#11 0xe36a18 (/usr/lib/llvm-3.6/bin/clang+0xe36a18)
#12 0xe32645 (/usr/lib/llvm-3.6/bin/clang+0xe32645)
#13 0xe335d1 (/usr/lib/llvm-3.6/bin/clang+0xe335d1)
#14 0xe33801 (/usr/lib/llvm-3.6/bin/clang+0xe33801)
#15 0xe3fcc5 (/usr/lib/llvm-3.6/bin/clang+0xe3fcc5)
#16 0xe40c63 (/usr/lib/llvm-3.6/bin/clang+0xe40c63)
#17 0xe40d7b (/usr/lib/llvm-3.6/bin/clang+0xe40d7b)
#18 0xe3ff35 (/usr/lib/llvm-3.6/bin/clang+0xe3ff35)
#19 0xe42ddf clang::Sema::SubstStmt(clang::Stmt*, 
clang::MultiLevelTemplateArgumentList const&) 
(/usr/lib/llvm-3.6/bin/clang+0xe42ddf)
#20 0xe65280 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, 
clang::FunctionDecl*, bool, bool) (/usr/lib/llvm-3.6/bin/clang+0xe65280)
#21 0xe63efb clang::Sema::PerformPendingInstantiations(bool) 
(/usr/lib/llvm-3.6/bin/clang+0xe63efb)
#22 0xe65365 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, 
clang::FunctionDecl*, bool, bool) (/usr/lib/llvm-3.6/bin/clang+0xe65365)
#23 0xe63efb clang::Sema::PerformPendingInstantiations(bool) 
(/usr/lib/llvm-3.6/bin/clang+0xe63efb)
#24 0xb157df clang::Sema::ActOnEndOfTranslationUnit() 
(/usr/lib/llvm-3.6/bin/clang+0xb157df)
#25 0xa68fa0 
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) 
(/usr/lib/llvm-3.6/bin/clang+0xa68fa0)
#26 0xa5ecc3 clang::ParseAST(clang::Sema&, bool, bool) 
(/usr/lib/llvm-3.6/bin/clang+0xa5ecc3)
#27 0x6efdc6 clang::FrontendAction::Execute() 
(/usr/lib/llvm-3.6/bin/clang+0x6efdc6)
#28 0x6cc2f9 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) 
(/usr/lib/llvm-3.6/bin/clang+0x6cc2f9)
#29 0x6b4c43 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) 
(/usr/lib/llvm-3.6/bin/clang+0x6b4c43)
#30 0x6af278 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) 
(/usr/lib/llvm-3.6/bin/clang+0x6af278)
#31 0x6ae8a3 main (/usr/lib/llvm-3.6/bin/clang+0x6ae8a3)
#32 0x7f9915884b45 __libc_start_main 
/tmp/buildd/glibc-2.19/csu/libc-start.c:321:0
#33 0x6ae912 _start (/usr/lib/llvm-3.6/bin/clang+0x6ae912)
Stack dump:
0.      Program arguments: /usr/lib/llvm-3.6/bin/clang -cc1 -triple 
x86_64-pc-linux-gnu -emit-llvm-bc -disable-free -disable-llvm-verifier 
-main-file-name mostfreq.cpp -mrelocation-model static -mthread-model posix 
-menable-no-infs -menable-no-nans -menable-unsafe-fp-math -ffp-contract=fast 
-ffast-math -masm-verbose -mconstructor-aliases -munwind-tables 
-fuse-init-array -target-cpu x86-64 -target-linker-version 2.25 
-momit-leaf-frame-pointer -g -dwarf-column-info -resource-dir 
/usr/lib/llvm-3.6/bin/../lib/clang/3.6.2 -D NDEBUG -I 
/opt/intel/composer_xe_2015.2.164/mkl/include -I /usr/local/include 
-internal-isystem 
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.1.1/../../../../include/c++/5.1.1 
-internal-isystem 
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.1.1/../../../../include/x86_64-linux-gnu/c++/5.1.1
 -internal-isystem 
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.1.1/../../../../include/x86_64-linux-gnu/c++/5.1.1
 -internal-isystem 
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.1.1/../../../../include/c++/5.1.1/b
 ackward -internal-isystem /usr/local/include -internal-isystem 
/usr/lib/llvm-3.6/bin/../lib/clang/3.6.2/include -internal-externc-isystem 
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include 
-internal-externc-isystem /usr/include -Ofast -Wall -Wextra -Werror -std=c++11 
-fdeprecated-macro -fdebug-compilation-dir /home/lorenz/coding/topk/pac 
-ferror-limit 19 -fmessage-length 118 -pthread -mstackrealign 
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option 
-fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/mostfreq-271846.o 
-x c++ mostfreq.cpp 
1.      <eof> parser at end of file
2.      mostfreq.cpp:23:6: instantiating function definition 'run'
3.      ./worker_ec.h:71:26: instantiating function definition 'run'
clang: error: unable to execute command: Segmentation fault
clang: error: clang frontend command failed due to signal (use -v to see 
invocation)
Debian clang version 3.6.2-+rc1-1~exp1 (tags/RELEASE_362/rc1) (based on LLVM 
3.6.2)
Target: x86_64-pc-linux-gnu
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to 
http://bugs.debian.org/ and include the crash backtrace, preprocessed source, 
and associated run script.
clang: note: diagnostic msg: Error generating preprocessed source(s).



The function 'run' in worker_ec.h is the callsite of select_dht.

If there is any way in which I can help track this down, I will gladly help.

Cheers,
Lorenz

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages clang-3.6 depends on:
ii  binutils                 2.25-11
ii  libc6                    2.19-19
ii  libc6-dev                2.19-19
ii  libclang-common-3.6-dev  1:3.6.2~+rc1-1~exp1
ii  libclang1-3.6            1:3.6.2~+rc1-1~exp1
ii  libedit2                 3.1-20150325-1
ii  libffi6                  3.2.1-3
ii  libgcc-4.9-dev           4.9.3-3
ii  libgcc1                  1:5.1.1-14
ii  libllvm3.6               1:3.6.2~+rc1-1~exp1
ii  libobjc-4.9-dev          4.9.3-3
ii  libstdc++-4.9-dev        4.9.3-3
ii  libstdc++6               5.1.1-14
ii  libtinfo5                5.9+20150516-2
ii  zlib1g                   1:1.2.8.dfsg-2+b1

Versions of packages clang-3.6 recommends:
ii  llvm-3.6-dev  1:3.6.2~+rc1-1~exp1
ii  python        2.7.9-1

Versions of packages clang-3.6 suggests:
pn  clang-3.6-doc  <none>
pn  gnustep        <none>
pn  gnustep-devel  <none>

-- no debconf information

--- End Message ---
--- Begin Message ---
Version: 1:3.6.2-4+rm

Dear submitter,

as the package llvm-toolchain-3.6 has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/836604

The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmas...@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Scott Kitterman (the ftpmaster behind the curtain)

--- End Message ---

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