[llvm-bugs] [Bug 31970] New: Assertion failure in lib/Support/APFloat.cpp

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Feb 15 05:31:09 PST 2017


http://bugs.llvm.org/show_bug.cgi?id=31970

            Bug ID: 31970
           Summary: Assertion failure in lib/Support/APFloat.cpp
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nickc at redhat.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 17986
  --> http://bugs.llvm.org/attachment.cgi?id=17986&action=edit
Preprocessed test case.

Compiling the attached preprocessed source code with the attached command line
triggers this assertion failure:

clang-4.0: /work/sources/llvm/current/lib/Support/APFloat.cpp:544: unsigned int
llvm::powerOf5(llvm::integerPart*, unsigned int): Assertion `power <=
maxExponent' failed.

The stack backtrace looks like this:

#0 0x00000000034cc20c llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/work/sources/llvm/current/lib/Support/Unix/Signals.inc:402:0
#1 0x00000000034cc29f PrintStackTraceSignalHandler(void*)
/work/sources/llvm/current/lib/Support/Unix/Signals.inc:466:0
#2 0x00000000034ca802 llvm::sys::RunSignalHandlers()
/work/sources/llvm/current/lib/Support/Signals.cpp:44:0
#3 0x00000000034cbb83 SignalHandler(int)
/work/sources/llvm/current/lib/Support/Unix/Signals.inc:256:0
#4 0x00007fee3a7e15c0 __restore_rt (/lib64/libpthread.so.0+0x115c0)
#5 0x00007fee3934991f __GI_raise
/usr/src/debug/glibc-2.24-33-ge9e69e4/signal/../sysdeps/unix/sysv/linux/raise.c:58:0
#6 0x00007fee3934b51a __GI_abort
/usr/src/debug/glibc-2.24-33-ge9e69e4/stdlib/abort.c:91:0
#7 0x00007fee39341da7 __assert_fail_base
/usr/src/debug/glibc-2.24-33-ge9e69e4/assert/assert.c:92:0
#8 0x00007fee39341e52 (/lib64/libc.so.6+0x2de52)
#9 0x00000000034049f5 llvm::powerOf5(unsigned long*, unsigned int)
/work/sources/llvm/current/lib/Support/APFloat.cpp:546:0
#10 0x0000000003408fa2
llvm::detail::IEEEFloat::roundSignificandWithExponent(unsigned long const*,
unsigned int, int, llvm::APFloatBase::roundingMode)
/work/sources/llvm/current/lib/Support/APFloat.cpp:2377:0
#11 0x000000000340966d
llvm::detail::IEEEFloat::convertFromDecimalString(llvm::StringRef,
llvm::APFloatBase::roundingMode)
/work/sources/llvm/current/lib/Support/APFloat.cpp:2556:0
#12 0x000000000340a023
llvm::detail::IEEEFloat::convertFromString(llvm::StringRef,
llvm::APFloatBase::roundingMode)
/work/sources/llvm/current/lib/Support/APFloat.cpp:2613:0
#13 0x0000000003411f8a llvm::APFloat::convertFromString(llvm::StringRef,
llvm::APFloatBase::roundingMode)
/work/sources/llvm/current/lib/Support/APFloat.cpp:4430:0
#14 0x000000000630756e
clang::NumericLiteralParser::GetFloatValue(llvm::APFloat&)
/work/sources/llvm/current/tools/clang/lib/Lex/LiteralSupport.cpp:997:0
#15 0x000000000538b907 BuildFloatingLiteral(clang::Sema&,
clang::NumericLiteralParser&, clang::QualType, clang::SourceLocation)
/work/sources/llvm/current/tools/clang/lib/Sema/SemaExpr.cpp:3220:0
#16 0x000000000538c8d0 clang::Sema::ActOnNumericConstant(clang::Token const&,
clang::Scope*)
/work/sources/llvm/current/tools/clang/lib/Sema/SemaExpr.cpp:3409:0
#17 0x0000000004dae72d clang::Parser::ParseCastExpression(bool, bool, bool&,
clang::Parser::TypeCastState)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseExpr.cpp:746:0
#18 0x0000000004dae35c clang::Parser::ParseCastExpression(bool, bool,
clang::Parser::TypeCastState)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseExpr.cpp:481:0
#19 0x0000000004dacfcc
clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseExpr.cpp:170:0
#20 0x0000000004d87b9e clang::Parser::ParseInitializer()
/work/sources/llvm/current/tools/clang/include/clang/Parse/Parser.h:1636:0
#21 0x0000000004d744fd
clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseDecl.cpp:2078:0
#22 0x0000000004d736c8 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&,
unsigned int, clang::SourceLocation*, clang::Parser::ForRangeInit*)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseDecl.cpp:1869:0
#23 0x0000000004d562ca
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
/work/sources/llvm/current/tools/clang/lib/Parse/Parser.cpp:986:0
#24 0x0000000004d56382
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier)
/work/sources/llvm/current/tools/clang/lib/Parse/Parser.cpp:1001:0
#25 0x0000000004d55a05
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*)
/work/sources/llvm/current/tools/clang/lib/Parse/Parser.cpp:851:0
#26 0x0000000004d54cef
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
/work/sources/llvm/current/tools/clang/lib/Parse/Parser.cpp:627:0
#27 0x0000000004d50e66 clang::ParseAST(clang::Sema&, bool, bool)
/work/sources/llvm/current/tools/clang/lib/Parse/ParseAST.cpp:146:0
#28 0x0000000003d0e575 clang::ASTFrontendAction::ExecuteAction()
/work/sources/llvm/current/tools/clang/lib/Frontend/FrontendAction.cpp:568:0
#29 0x000000000415de26 clang::CodeGenAction::ExecuteAction()
/work/sources/llvm/current/tools/clang/lib/CodeGen/CodeGenAction.cpp:973:0
#30 0x0000000003d0dfe3 clang::FrontendAction::Execute()
/work/sources/llvm/current/tools/clang/lib/Frontend/FrontendAction.cpp:472:0
#31 0x0000000003cb39a5
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
/work/sources/llvm/current/tools/clang/lib/Frontend/CompilerInstance.cpp:951:0
#32 0x0000000003e3b18b
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
/work/sources/llvm/current/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:249:0
#33 0x0000000001868da7 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) /work/sources/llvm/current/tools/clang/tools/driver/cc1_main.cpp:221:0
#34 0x000000000185eb5f ExecuteCC1Tool(llvm::ArrayRef<char const*>,
llvm::StringRef)
/work/sources/llvm/current/tools/clang/tools/driver/driver.cpp:299:0
#35 0x000000000185f6ee main
/work/sources/llvm/current/tools/clang/tools/driver/driver.cpp:380:0
#36 0x00007fee39334401 __libc_start_main
/usr/src/debug/glibc-2.24-33-ge9e69e4/csu/../csu/libc-start.c:323:0
#37 0x000000000185c55a _start
(/work/builds/llvm/current/native/bin/clang-4.0+0x185c55a)
Stack dump:
0.      Program arguments: /work/builds/llvm/current/native/bin/clang-4.0 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
-main-file-name float-exact-1.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
/work/builds/llvm/current/native/bin/../lib/clang/5.0.0 -internal-isystem
/usr/local/include -internal-isystem
/work/builds/llvm/current/native/bin/../lib/clang/5.0.0/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include -w
-fdebug-compilation-dir /work/builds/llvm/current/native/tests -ferror-limit 19
-fmessage-length 130 -fobjc-runtime=gcc -fdiagnostics-show-option -o
/dev/shm/float-exact-1-9be66d.o -x c
/work/sources/gcc/current/gcc/testsuite/gcc.dg/float-exact-1.c 
1.      /work/sources/gcc/current/gcc/testsuite/gcc.dg/float-exact-1.c:292:1:
current parser token
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048922824617117723876384637412932380635306714345354710568410\
140587435077620501285599837051978855056335305570615129711860\
309387503970812843734718712815925040263182888714533431137355\
255722368962836390856001176889513153529416105504464217522618\
741534232432067776306691118141998014985541610448993152948945\
865983354717289054861249734477980864059509622993770525110616\
313865830823478927462500895844216364365499438449134659145333\
799994034010282254566331595018205841080487728993632798168070\
476921205941768965021887178681810499301253039335978279707627\
295287697256489961179958946847840431902105306618594831078534\
622089641993900896756734276531931450266972752637997248151974\
2277811246822238899767398834228515624999e-4951L'

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