| Issue |
203575
|
| Summary |
SemaChecking.cpp:12602: Assertion `unsignedRange->NonNegative && "unsigned range includes negative?"' failed
|
| Labels |
|
| Assignees |
|
| Reporter |
lmaltsis
|
```c
typedef unsigned a __attribute__((__vector_size__(sizeof 2)));
int b(a *c) {
return - 8 == -*c;
}
```
(found via a fuzzer, reduced with csmith)
https://godbolt.org/z/aqjjq899T
Triggers on https://github.com/llvm/llvm-project/commit/93bc18ff2d13e3246a7629ca17bb8352d2c51d89
```sh
$ clang /tmp/bug.c
clang-23: /home/user/software/llvm-install/slot-a/src/clang/lib/Sema/SemaChecking.cpp:12602: void AnalyzeComparison(clang::Sema&, clang::BinaryOperator*): Assertion `unsignedRange->NonNegative && "unsigned range includes negative?"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
Stack dump:
0. Program arguments: /home/user/software/llvm-install/slot-a/bin/clang-23 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -dumpdir a- -disable-free -clear-ast-before-backend -main-file-name bug.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/tmp/creduce -fcoverage-compilation-dir=/tmp/creduce -resource-dir /home/user/software/llvm-install/slot-a/lib/clang/23 -internal-isystem /home/user/software/llvm-install/slot-a/lib/clang/23/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fmessage-length=123 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcolor-diagnostics -faddrsig -fdwarf2-cfi-asm -o /tmp/bug-e81ad0.o -x c /tmp/bug.c
1. /tmp/bug.c:4:22: current parser token ';'
2. /tmp/bug.c:3:14: parsing function body 'b'
3. /tmp/bug.c:3:14: in compound statement ('{}')
#0 0x00005737c25434c2 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x23504c2)
#1 0x00005737c25400ec llvm::sys::RunSignalHandlers() (/home/user/software/llvm-install/slot-a/bin/clang-23+0x234d0ec)
#2 0x00005737c254024c SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00005737c254030c SignalHandlerTerminate(int, siginfo_t*, void*) Signals.cpp:0:0
#4 0x00007a2111845330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x00007a211189eb2c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
#6 0x00007a211189eb2c __pthread_kill_internal ./nptl/pthread_kill.c:78:10
#7 0x00007a211189eb2c pthread_kill ./nptl/pthread_kill.c:89:10
#8 0x00007a211184527e raise ./signal/../sysdeps/posix/raise.c:27:6
#9 0x00007a21118288ff abort ./stdlib/abort.c:81:7
#10 0x00007a211182881b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#11 0x00007a211183b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#12 0x00005737c4ee2a37 AnalyzeImplicitConversions(clang::Sema&, clang::Expr*, clang::SourceLocation, bool) (.constprop.0) SemaChecking.cpp:0:0
#13 0x00005737c4ee30ad clang::Sema::CheckCompletedExpr(clang::Expr*, clang::SourceLocation, bool) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4cf00ad)
#14 0x00005737c52a875e clang::Sema::ActOnFinishFullExpr(clang::Expr*, clang::SourceLocation, bool, bool, bool) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x50b575e)
#15 0x00005737c55e4907 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x53f1907)
#16 0x00005737c55e563f clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x53f263f)
#17 0x00005737c4d7d348 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::LabelDecl*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4b8a348)
#18 0x00005737c4d7e6e3 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4b8b6e3)
#19 0x00005737c4d7fec1 clang::Parser::ParseCompoundStatementBody(bool) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4b8cec1)
#20 0x00005737c4d806af clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4b8d6af)
#21 0x00005737c4c80abb clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::LateParsedAttrList*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a8dabb)
#22 0x00005737c4cc415d clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4ad115d)
#23 0x00005737c4c7b281 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a88281)
#24 0x00005737c4c7babf clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a88abf)
#25 0x00005737c4c84171 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a91171)
#26 0x00005737c4c8508d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a9208d)
#27 0x00005737c4c6232a clang::ParseAST(clang::Sema&, bool, bool) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x4a6f32a)
#28 0x00005737c3225d31 clang::FrontendAction::Execute() (/home/user/software/llvm-install/slot-a/bin/clang-23+0x3032d31)
#29 0x00005737c31a7038 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x2fb4038)
#30 0x00005737c3320d6e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0x312dd6e)
#31 0x00005737c0f1a5c9 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/user/software/llvm-install/slot-a/bin/clang-23+0xd275c9)
#32 0x00005737c0f10837 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#33 0x00005737c0f15523 clang_main(int, char**, llvm::ToolContext const&) (/home/user/software/llvm-install/slot-a/bin/clang-23+0xd22523)
#34 0x00005737c0e0c4c0 main (/home/user/software/llvm-install/slot-a/bin/clang-23+0xc194c0)
#35 0x00007a211182a1ca __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#36 0x00007a211182a28b call_init ./csu/../csu/libc-start.c:128:20
#37 0x00007a211182a28b __libc_start_main ./csu/../csu/libc-start.c:347:5
#38 0x00005737c0f0fcb5 _start (/home/user/software/llvm-install/slot-a/bin/clang-23+0xd1ccb5)
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed with exit code -2 (use -v to see invocation)
clang version 23.0.0git (https://github.com/llvm/llvm-project.git 93bc18ff2d13e3246a7629ca17bb8352d2c51d89)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/user/software/llvm-install/slot-a/bin
Build config: +assertions
clang: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING CRASH REPRODUCER FILES TO THE BUG REPORT:
clang: note: diagnostic msg: /tmp/bug-4d2e1f.c
clang: note: diagnostic msg: /tmp/bug-4d2e1f.sh
clang: note: diagnostic msg:
********************
Aborted (core dumped)
```
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