[llvm-bugs] [Bug 28034] New: clang crashes on invalid C++ code with -std=c++14: Assertion `!ExprNeedsCleanups && "Unaccounted cleanups in function"' failed
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Jun 6 22:52:14 PDT 2016
https://llvm.org/bugs/show_bug.cgi?id=28034
Bug ID: 28034
Summary: clang crashes on invalid C++ code with -std=c++14:
Assertion `!ExprNeedsCleanups && "Unaccounted cleanups
in function"' failed
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: su at cs.ucdavis.edu
CC: llvm-bugs at lists.llvm.org
Classification: Unclassified
The current clang trunk crashes when compiling the following C++ test case with
-std=c++14 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
The code is correctly rejected by the trunk with -std=c++11.
3.8.x (incorrectly) accepts and compiles the code with -std=c++14, while, like
the trunk, 3.4.x to 3.7.x all crash on the same code (with either -std=c++14 or
-std=c++1y).
With "~S ();" removed from struct S' definition, the code is incorrectly
accepted by 3.4.x and later (including trunk) with -std=c++14 or -std=c++1y.
$ clang++ -v
clang version 3.9.0 (trunk 271877)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
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/5.3.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clang++-3.8 -c -std=c++14 small.cpp
$ clang++-3.8 -c -std=c++11 small.cpp
small.cpp:15:21: error: array size expression must have integral or unscoped
enumeration type, not 'int ()'
W (int) : data (new T[foo]) {}
^ ~~~
1 error generated.
$
$ clang++ -c -std=c++11 small.cpp
small.cpp:15:21: error: array size expression must have integral or unscoped
enumeration type, not 'int ()'
W (int) : data (new T[foo]) {}
^ ~~~
1 error generated.
$
$ clang++ -c -std=c++14 small.cpp
clang-3.9:
/tmp/llvm-builder/llvm-source-trunk/tools/clang/lib/Sema/SemaDecl.cpp:11651:
clang::Decl* clang::Sema::ActOnFinishFunctionBody(clang::Decl*, clang::Stmt*,
bool): Assertion `!ExprNeedsCleanups && "Unaccounted cleanups in function"'
failed.
#0 0x0000000001e1a4f5 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang-3.9+0x1e1a4f5)
#1 0x0000000001e18486 llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang-3.9+0x1e18486)
#2 0x0000000001e186a4 SignalHandler(int)
(/usr/local/clang-trunk/bin/clang-3.9+0x1e186a4)
#3 0x00007f07400be340 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x00007f073f2dccc9 gsignal
/build/eglibc-3GlaMS/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f073f2e00d8 abort
/build/eglibc-3GlaMS/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f073f2d5b86 __assert_fail_base
/build/eglibc-3GlaMS/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f073f2d5c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x0000000002bee7e5 clang::Sema::ActOnFinishFunctionBody(clang::Decl*,
clang::Stmt*, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2bee7e5)
#9 0x0000000002f78af0
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2f78af0)
#10 0x0000000002f772b7 clang::Sema::PerformPendingInstantiations(bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x2f772b7)
#11 0x0000000002b358bd clang::Sema::ActOnEndOfTranslationUnit()
(/usr/local/clang-trunk/bin/clang-3.9+0x2b358bd)
#12 0x000000000292c131
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/local/clang-trunk/bin/clang-3.9+0x292c131)
#13 0x000000000292365b clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang-3.9+0x292365b)
#14 0x00000000025c23fe clang::CodeGenAction::ExecuteAction()
(/usr/local/clang-trunk/bin/clang-3.9+0x25c23fe)
#15 0x000000000228f1fe clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang-3.9+0x228f1fe)
#16 0x0000000002264c66
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang-3.9+0x2264c66)
#17 0x000000000231c362
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang-3.9+0x231c362)
#18 0x0000000000aecce8 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/clang-trunk/bin/clang-3.9+0xaecce8)
#19 0x0000000000aa14de main (/usr/local/clang-trunk/bin/clang-3.9+0xaa14de)
#20 0x00007f073f2c7ec5 __libc_start_main
/build/eglibc-3GlaMS/eglibc-2.19/csu/libc-start.c:321:0
#21 0x0000000000ae8d54 _start (/usr/local/clang-trunk/bin/clang-3.9+0xae8d54)
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang-3.9 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
small.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
-coverage-file /data2/small.cpp -resource-dir
/usr/local/clang-trunk/bin/../lib/clang/3.9.0 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9 -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.9.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -std=c++14 -fdeprecated-macro
-fdebug-compilation-dir /data2 -ferror-limit 19 -fmessage-length 252
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -o small.o -x c++ small.cpp
1. <eof> parser at end of file
2. small.cpp:18:3: instantiating function definition 'V<int>::V'
clang-3.9: error: unable to execute command: Aborted (core dumped)
clang-3.9: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.9.0 (trunk 271877)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
clang-3.9: 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-3.9: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.9: note: diagnostic msg: /tmp/small-218de6.cpp
clang-3.9: note: diagnostic msg: /tmp/small-218de6.sh
clang-3.9: note: diagnostic msg:
********************
$
-----------------------------------------------------
int foo ();
struct S
{
~S ();
};
template < class T >
struct V
{
struct W
{
T *data;
// should be: W (int) : data (new T[foo()]) {}
W (int) : data (new T[foo]) {}
} *rep;
V (S p1) : rep (new W (m_fn1 (p1))) {}
int m_fn1 (S);
};
struct Z : V < int >
{
Z () : V (S ()) {}
};
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