Crashing clang-4.0 on ubuntu


Bugzilla Link	PR32589
Status	NEW
Importance	P enhancement
Reported by	mrdvlpr.xnu@gmail.com
Reported on	2017-04-10 03:18:44 -0700
Last modified on	2017-04-10 03:18:44 -0700
Version	4.0
Hardware	PC Linux
CC	llvm-bugs@lists.llvm.org
Fixed by commit(s)
Attachments	`test-b1224f.c` (100030 bytes, text/x-csrc)
Blocks
Blocked by
See also

Created attachment 18254
C generated file

The following command will crash clang-4.0 on ubuntu 16.04 (note that this also
crashes 3.8 and 3.9)

$ python -c "print('{' * 99999)" > test.c && clang-4.0 test.c

Output of the command:

test.c:1:1: error: expected identifier or '('
#0 0x00007ffa3a2205e8 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/lib/x86_64-linux-gnu/libLLVM-4.0.so.1+0x70e5e8)
#1 0x00007ffa3a21e76e llvm::sys::RunSignalHandlers() (/usr/lib/x86_64-linux-
gnu/libLLVM-4.0.so.1+0x70c76e)
#2 0x00007ffa3a21e8bc (/usr/lib/x86_64-linux-gnu/libLLVM-4.0.so.1+0x70c8bc)
#3 0x00007ffa3ca72390 __restore_rt (/lib/x86_64-linux-
gnu/libpthread.so.0+0x11390)
#4 0x00000000018e5ed2 clang::Lexer::LexTokenInternal(clang::Token&, bool)
(/usr/lib/llvm-4.0/bin/clang+0x18e5ed2)
#5 0x000000000194f218 clang::Preprocessor::Lex(clang::Token&) (/usr/lib/llvm-
4.0/bin/clang+0x194f218)
#6 0x0000000000d63807
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63807)
#7 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63a9a)
#8 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63a9a)
#9 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63a9a)
#10 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63a9a)
#11 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib

.... (Recursion output)
.... (Recursion output)
.... (Recursion output)

#255 0x0000000000d63a9a
clang::Parser::SkipUntil(llvm::ArrayRef<clang::tok::TokenKind>,
clang::Parser::SkipUntilFlags) (/usr/lib/llvm-4.0/bin/clang+0xd63a9a)
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 test.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 /usr/lib/llvm-4.0/bin/../lib/clang/4.0.0 -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 -fdebug-compilation-dir /tmp -ferror-limit 19 -
fmessage-length 174 -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-
diagnostics -o /tmp/test-a00671.o -x c test.c
1.  <unknown> parser at unknown location
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-svn297204-1~exp1 (branches/release_40)
Target: x86_64-pc-linux-gnu

Quuxplusone / LLVMBugzillaTest

Crashing clang-4.0 on ubuntu #31561