https://llvm.org/bugs/show_bug.cgi?id=28906
Bug ID: 28906
Summary: clang crashes (ICE) when compiling a program with
complex noexcept declaration
Product: clang
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: unassignedclangb...@nondot.org
Reporter: beck...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16912
--> https://llvm.org/bugs/attachment.cgi?id=16912&action=edit
variant.cpp compiling at C++11 causes ICE in all versions of clang that I
tested
I was able to crash clang-3.5, 3.6, 3.8, and 4.0. (Didn't test 3.7 or 3.9.)
Running ubuntu linux, using compilers from repository and/or
ppa:r/toolchain/test.
I didn't test with trunk.
No special flags are needed but it must be compiled at C++11 standard.
Please find (single, self-contained) source file attached.
Here is `clang-4.0` output:
$ clang-4.0 -std=c++11 variant.cpp
variant.cpp:300:46: error: no type named 'type' in
'strict_variant::detail::return_typer<strict_variant::detail::false_,
strict_variant::detail::storage<int, float>,
strict_variant::some_visitor>::noexcept_prop<0>'
using type = mpl::TypeList<typename F<us>::type...>;
~~~~~~~~~~~~~~~~^~~~
variant.cpp:407:64: note: in instantiation of template class
'strict_variant::mpl::ulist_map<return_typer<false_, storage<int, float>,
some_visitor>::noexcept_prop, strict_variant::mpl::ulist<0, 1> >' requested
here
typename
mpl::ulist_map<return_typer<Internal, Storage, Visitor>::template
noexcept_prop,
^
variant.cpp:601:68: note: in instantiation of exception specification for
'operator()<strict_variant::detail::storage<int, float>,
strict_variant::some_visitor>' requested here
apply_visitor(Visitor && visitor, Visitable && visitable)
noexcept(APPLY_VISITOR_UNEVALUATED_EXPR)
^
variant.cpp:572:5: note: expanded from macro 'APPLY_VISITOR_UNEVALUATED_EXPR'
std::declval<Visitable>().get_visitor_dispatch()(
\
^
variant.cpp:637:24: note: in instantiation of exception specification for
'apply_visitor<strict_variant::some_visitor, strict_variant::variant<int,
float> >' requested here
static_assert(noexcept(apply_visitor(some_visitor{}, std::declval<variant<int,
float>>())), "Apply visitor noexcept annotation not working!");
^
variant.cpp:601:68: error: argument to noexcept specifier must be a constant
expression
apply_visitor(Visitor && visitor, Visitable && visitable)
noexcept(APPLY_VISITOR_UNEVALUATED_EXPR)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
variant.cpp:572:5: note: expanded from macro 'APPLY_VISITOR_UNEVALUATED_EXPR'
std::declval<Visitable>().get_visitor_dispatch()(
\
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
variant.cpp:637:24: note: in instantiation of exception specification for
'apply_visitor<strict_variant::some_visitor, strict_variant::variant<int,
float> >' requested here
static_assert(noexcept(apply_visitor(some_visitor{}, std::declval<variant<int,
float>>())), "Apply visitor noexcept annotation not working!");
^
variant.cpp:601:68: note: non-constexpr function
'declval<strict_variant::variant<int, float> >' cannot be used in a constant
expression
apply_visitor(Visitor && visitor, Visitable && visitable)
noexcept(APPLY_VISITOR_UNEVALUATED_EXPR)
^
variant.cpp:572:5: note: expanded from macro 'APPLY_VISITOR_UNEVALUATED_EXPR'
std::declval<Visitable>().get_visitor_dispatch()(
\
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.1.1/../../../../include/c++/6.1.1/type_traits:2257:5:
note: declared here
declval() noexcept
^
variant.cpp:637:1: error: static_assert failed "Apply visitor noexcept
annotation not working!"
static_assert(noexcept(apply_visitor(some_visitor{}, std::declval<variant<int,
float>>())), "Apply visitor noexcept annotation not working!");
^
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#0 0x00007ffb3efbeca8 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/lib/x86_64-linux-gnu/libLLVM-4.0.so.1+0x68aca8)
#1 0x00007ffb3efbce1e llvm::sys::RunSignalHandlers()
(/usr/lib/x86_64-linux-gnu/libLLVM-4.0.so.1+0x688e1e)
#2 0x00007ffb3efbcf6c (/usr/lib/x86_64-linux-gnu/libLLVM-4.0.so.1+0x688f6c)
#3 0x00007ffb415683d0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x113d0)
#4 0x000000000155832d
clang::ASTContext::getSubstTemplateTypeParmType(clang::TemplateTypeParmType
const*, clang::QualType) const (/usr/lib/llvm-4.0/bin/clang+0x155832d)
#5 0x00000000011adf80 (/usr/lib/llvm-4.0/bin/clang+0x11adf80)
#6 0x00000000011af44a (/usr/lib/llvm-4.0/bin/clang+0x11af44a)
#7 0x00000000011ba215 (/usr/lib/llvm-4.0/bin/clang+0x11ba215)
#8 0x00000000011bd950 (/usr/lib/llvm-4.0/bin/clang+0x11bd950)
#9 0x00000000011c12ac (/usr/lib/llvm-4.0/bin/clang+0x11c12ac)
#10 0x00000000011b63d5 (/usr/lib/llvm-4.0/bin/clang+0x11b63d5)
#11 0x00000000011c5a7f (/usr/lib/llvm-4.0/bin/clang+0x11c5a7f)
#12 0x00000000011b6684 (/usr/lib/llvm-4.0/bin/clang+0x11b6684)
#16 0x00000000011b6684 (/usr/lib/llvm-4.0/bin/clang+0x11b6684)
#17 0x00000000011c5a7f (/usr/lib/llvm-4.0/bin/clang+0x11c5a7f)
#18 0x00000000011b6684 (/usr/lib/llvm-4.0/bin/clang+0x11b6684)
#19 0x00000000011c7a3b (/usr/lib/llvm-4.0/bin/clang+0x11c7a3b)
#20 0x00000000011c7c6b clang::Sema::SubstExceptionSpec(clang::FunctionDecl*,
clang::FunctionProtoType const*, clang::MultiLevelTemplateArgumentList const&)
(/usr/lib/llvm-4.0/bin/clang+0x11c7c6b)
#21 0x00000000011d41ad
clang::Sema::InstantiateExceptionSpec(clang::SourceLocation,
clang::FunctionDecl*) (/usr/lib/llvm-4.0/bin/clang+0x11d41ad)
#22 0x0000000000f6f4b7 clang::Sema::ResolveExceptionSpec(clang::SourceLocation,
clang::FunctionProtoType const*) (/usr/lib/llvm-4.0/bin/clang+0xf6f4b7)
#23 0x0000000000f72a15 (/usr/lib/llvm-4.0/bin/clang+0xf72a15)
#24 0x0000000000f7463a clang::Sema::canThrow(clang::Expr const*)
(/usr/lib/llvm-4.0/bin/clang+0xf7463a)
#25 0x0000000000fdd57e clang::Sema::BuildCXXNoexceptExpr(clang::SourceLocation,
clang::Expr*, clang::SourceLocation) (/usr/lib/llvm-4.0/bin/clang+0xfdd57e)
#26 0x0000000000fdd71f clang::Sema::ActOnNoexceptExpr(clang::SourceLocation,
clang::SourceLocation, clang::Expr*, clang::SourceLocation)
(/usr/lib/llvm-4.0/bin/clang+0xfdd71f)
#27 0x0000000000cc1fa3 clang::Parser::ParseCastExpression(bool, bool, bool&,
clang::Parser::TypeCastState) (/usr/lib/llvm-4.0/bin/clang+0xcc1fa3)
#28 0x0000000000cc2d6d clang::Parser::ParseCastExpression(bool, bool,
clang::Parser::TypeCastState) (/usr/lib/llvm-4.0/bin/clang+0xcc2d6d)
#29 0x0000000000cc1334 clang::Parser::ParseCastExpression(bool, bool, bool&,
clang::Parser::TypeCastState) (/usr/lib/llvm-4.0/bin/clang+0xcc1334)
#30 0x0000000000cc2d6d clang::Parser::ParseCastExpression(bool, bool,
clang::Parser::TypeCastState) (/usr/lib/llvm-4.0/bin/clang+0xcc2d6d)
#31 0x0000000000cc75be
clang::Parser::ParseConstantExpression(clang::Parser::TypeCastState)
(/usr/lib/llvm-4.0/bin/clang+0xcc75be)
#32 0x0000000000cb193c
clang::Parser::ParseStaticAssertDeclaration(clang::SourceLocation&)
(/usr/lib/llvm-4.0/bin/clang+0xcb193c)
#33 0x0000000000ca6fe7 clang::Parser::ParseDeclaration(unsigned int,
clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&)
(/usr/lib/llvm-4.0/bin/clang+0xca6fe7)
#34 0x0000000000c86e81
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) (/usr/lib/llvm-4.0/bin/clang+0xc86e81)
#35 0x0000000000cb3d4b
clang::Parser::ParseInnerNamespace(std::vector<clang::SourceLocation,
std::allocator<clang::SourceLocation> >&, std::vector<clang::IdentifierInfo*,
std::allocator<clang::IdentifierInfo*> >&, std::vector<clang::SourceLocation,
std::allocator<clang::SourceLocation> >&, unsigned int, clang::SourceLocation&,
clang::ParsedAttributes&, clang::BalancedDelimiterTracker&)
(/usr/lib/llvm-4.0/bin/clang+0xcb3d4b)
#36 0x0000000000cb44a9 clang::Parser::ParseNamespace(unsigned int,
clang::SourceLocation&, clang::SourceLocation)
(/usr/lib/llvm-4.0/bin/clang+0xcb44a9)
#37 0x0000000000ca709d clang::Parser::ParseDeclaration(unsigned int,
clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&)
(/usr/lib/llvm-4.0/bin/clang+0xca709d)
#38 0x0000000000c86e81
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) (/usr/lib/llvm-4.0/bin/clang+0xc86e81)
#39 0x0000000000c8784c
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/lib/llvm-4.0/bin/clang+0xc8784c)
#40 0x0000000000c7c7ab clang::ParseAST(clang::Sema&, bool, bool)
(/usr/lib/llvm-4.0/bin/clang+0xc7c7ab)
#41 0x0000000000a43e2e clang::FrontendAction::Execute()
(/usr/lib/llvm-4.0/bin/clang+0xa43e2e)
#42 0x0000000000a16316
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/lib/llvm-4.0/bin/clang+0xa16316)
#43 0x0000000000abf2d2
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/lib/llvm-4.0/bin/clang+0xabf2d2)
#44 0x000000000071f518 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/lib/llvm-4.0/bin/clang+0x71f518)
#45 0x0000000000712029 main (/usr/lib/llvm-4.0/bin/clang+0x712029)
#46 0x00007ffb3dce4830 __libc_start_main
/build/glibc-GKVZIf/glibc-2.23/csu/../csu/libc-start.c:325:0
#47 0x000000000071d889 _start (/usr/lib/llvm-4.0/bin/clang+0x71d889)
Stack dump:
0. Program arguments: /usr/lib/llvm-4.0/bin/clang -cc1 -triple
x86_64-pc-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name variant.cpp -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/lib/llvm-4.0/bin/../lib/clang/4.0.0 -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/lib/llvm-4.0/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 -std=c++11 -fdeprecated-macro
-fdebug-compilation-dir /home/chris/ice_testcase -ferror-limit 19
-fmessage-length 211 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/variant-71f7bb.o -x c++
variant.cpp
1. variant.cpp:638:98: current parser token ','
2. variant.cpp:625:1: parsing namespace 'strict_variant'
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 4.0.0-svn277311-1~exp1 (trunk)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: 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: 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/variant-37fb1f.cpp
clang: note: diagnostic msg: /tmp/variant-37fb1f.sh
clang: note: diagnostic msg:
********************
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