https://bugs.llvm.org/show_bug.cgi?id=45122
Bug ID: 45122
Summary: Segmentation fault in memet function
Product: clang
Version: 6.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
Hi, this code test.c
#include <stdio.h>
#include <string.h>
void foo(int* a ) {
a[-1]=1;
}
int main (int argc, char* argv[]) {
int size= 10;
printf("%d\n", size);
int array[size];
memset(array,0,size*sizeof(int));
foo(array);
return 0;
}
get "Segmentation fault" when I use `clang-6.0 test.c ` to compiler and then
`./a.out` to execute (-O1 is also fault, in ubuntu 16.04).
I know that the index of an array is -1 and not suitable, but when I add -O2,
-O3, or -Os to compile it, then the fault is gone. I also test clang-3.8, and
it has the same results.
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