http://llvm.org/bugs/show_bug.cgi?id=6356
Summary: Violated assertion "unsigned range includes negative?"
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: major
Priority: P2
Component: Semantic Analyzer
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
This is a reduced testcase coming from the Linux kernel:
$ cat bug8.c
void foo(unsigned int ui) {
long l = 2;
(ui -= l) < 3;
}
$ gcc -c bug8.c
$ icc -c bug8.c
$ clang -c -m64 bug8.c
clang: SemaChecking.cpp:2030: void clang::Sema::CheckSignCompare(clang::Expr*,
clang::Expr*, clang::SourceLocation, const clang::PartialDiagnostic&, bool):
Assertion `unsignedRange.NonNegative && "unsigned range includes negative?"'
failed.
0 clang 0x00000000012f2d9a
1 clang 0x00000000012f2c13
2 libpthread.so.0 0x0000003b87e0f0f0
3 libc.so.6 0x0000003b872326c5 gsignal + 53
4 libc.so.6 0x0000003b87233ea5 abort + 373
5 libc.so.6 0x0000003b8722b7b5 __assert_fail + 245
6 clang 0x000000000067eb8b
7 clang 0x000000000071ecb8
8 clang 0x00000000007233ad
9 clang 0x000000000072444a
10 clang 0x0000000000724256
11 clang 0x00000000009f55f8
12 clang 0x00000000009f47b5
13 clang 0x00000000009f4093
14 clang 0x00000000009ce387
15 clang 0x00000000009cff92
16 clang 0x00000000009d504d
17 clang 0x00000000009dad4c
18 clang 0x00000000009dfe65
19 clang 0x00000000009da841
20 clang 0x00000000009da8ab
21 clang 0x00000000009da203
22 clang 0x00000000009d9ad1
23 clang 0x0000000000665a41
24 clang 0x000000000042dbfe
25 clang 0x000000000042d88c
26 clang 0x0000000000417e42
27 clang 0x0000000000407ef9
28 clang 0x000000000040c600 main + 244
29 libc.so.6 0x0000003b8721eb1d __libc_start_main + 253
30 clang 0x0000000000406b19
Stack dump:
0. Program arguments: /home/roberto/llvm/Debug/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -S -disable-free -main-file-name bug8.c
-mrelocation-model static -mdisable-fp-elim -munwind-tables -target-cpu x86-64
-resource-dir /home/roberto/llvm/Debug/lib/clang/1.1 -fmessage-length 80
-fgnu-runtime -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-hxSyGu.s
-x c bug8.c
1. bug8.c:3:16: current parser token ';'
2. bug8.c:1:27: parsing function body 'foo'
3. bug8.c:1:27: in compound statement ('{}')
clang: error: compiler command failed due to signal 6 (use -v to see
invocation)
$
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