https://bugs.llvm.org/show_bug.cgi?id=34160
Bug ID: 34160
Summary: Unsigned integer over in std::mt19937 when using 0 as
a seed
Product: libc++
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: yaghmour.sha...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
The following program
#include <random>
int main() {
std::mt19937 instance(0) ;
}
when build using the following command line:
clang++ -std=c++14 -fsanitize=address -fsanitize=undefined,integer
and then run produces the following diagnostic:
random:2312:26: runtime error: unsigned integer overflow: 1812433253 *
1812433254 cannot be represented in type 'unsigned int'
Being unsigned overflow this is not undefined behavior but if this is intended
behavior it would be helpful if it was sanitizer was suppressed, I guess via:
__attribute__((no_sanitize("integer")))
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