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      1 // RUN: %clang_cl_asan -O0 %s -Fe%t
      2 // RUN: not %run %t 2>&1 | FileCheck %s
      3 
      4 #include <windows.h>
      5 
      6 int main() {
      7   char *buffer = new char;
      8   buffer[-1] = 42;
      9 // CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
     10 // CHECK: WRITE of size 1 at [[ADDR]] thread T0
     11 // CHECK:   {{#0 .* main .*operator_new_left_oob.cc}}:[[@LINE-3]]
     12 // CHECK: [[ADDR]] is located 1 bytes to the left of 1-byte region
     13 // CHECK: allocated by thread T0 here:
     14 // CHECK:   {{#0 .* operator new}}
     15 // CHECK:   {{#1 .* main .*operator_new_left_oob.cc}}:[[@LINE-8]]
     16   delete buffer;
     17 }
     18