// RUN: clang -O -g -fsanitize=address %t && ./a.outint main(int argc, char **argv) {  int *array = new int[100];  delete [] array;  return array[argc];  // BOOM}

===================================================================6254== ERROR: AddressSanitizer: heap-use-after-free on address 0x603e0001fc64 at pc 0x417f6a bp 0x7fff626b3250 sp 0x7fff626b3248READ of size 4 at 0x603e0001fc64 thread T0    #0 0x417f69 in main example_UseAfterFree.cc:5    #1 0x7fae62b5076c (/lib/x86_64-linux-gnu/libc.so.6+0x2176c)    #2 0x417e54 (a.out+0x417e54)0x603e0001fc64 is located 4 bytes inside of 400-byte region [0x603e0001fc60,0x603e0001fdf0)freed by thread T0 here:    #0 0x40d4d2 in operator delete[](void*) /home/kcc/llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:61    #1 0x417f2e in main example_UseAfterFree.cc:4previously allocated by thread T0 here:    #0 0x40d312 in operator new[](unsigned long) /home/kcc/llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:46    #1 0x417f1e in main example_UseAfterFree.cc:3Shadow bytes around the buggy address:  0x1c07c0003f30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa  0x1c07c0003f40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa  0x1c07c0003f50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa  0x1c07c0003f60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa  0x1c07c0003f70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa=>0x1c07c0003f80: fa fa fa fa fa fa fa fa fa fa fa fa[fd]fd fd fd  0x1c07c0003f90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd  0x1c07c0003fa0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd  0x1c07c0003fb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa  0x1c07c0003fc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa  0x1c07c0003fd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa faShadow byte legend (one shadow byte represents 8 application bytes):  Addressable:           00  Partially addressable: 01 02 03 04 05 06 07   Heap left redzone:     fa  Heap righ redzone:     fb  Freed Heap region:     fd  Stack left redzone:    f1  Stack mid redzone:     f2  Stack right redzone:   f3  Stack partial redzone: f4  Stack after return:    f5  Stack use after scope: f8  Global redzone:        f9  Global init order:     f6  Poisoned by user:      f7  ASan internal:         fe==6254== ABORTING