==1907==AddressSanitizer Init done
/Users/runner/runners/2.159.0/work/zlib-ng/zlib-ng/arch/x86/crc_folding.c:252:20: runtime error: unsigned integer overflow: 0 - 4464207872 cannot be represented in type 'unsigned long'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /Users/runner/runners/2.159.0/work/zlib-ng/zlib-ng/arch/x86/crc_folding.c:252:20 in 
=================================================================
==1907==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x00010a1ccda0 at pc 0x000106752bbe bp 0x7ffee95d5b90 sp 0x7ffee95d5b88
READ of size 16 at 0x00010a1ccda0 thread T0
    #0 0x106752bbd in crc_fold_copy crc_folding.c:333
    #1 0x10663ecd6 in copy_with_crc crc32.c:212
    #2 0x10668d0fe in read_buf deflate.c:1202
    #3 0x10674a232 in fill_window_sse fill_window_sse.c:78
    #4 0x1066a2c10 in deflate_medium deflate_medium.c:217
    #5 0x106663326 in zng_deflate deflate.c:1035
    #6 0x10677c1bc in gz_comp gzwrite.c:115
    #7 0x1067734e1 in gz_write gzwrite.c:214
    #8 0x10677198f in zng_gzwrite gzwrite.c:245
    #9 0x10662cd25 in test_gzio_deflate_inflate example.c:286
    #10 0x106637f82 in main example.c:1495
    #11 0x7fff5c1783d4 in start (libdyld.dylib:x86_64+0x163d4)

0x00010a1ccda3 is located 0 bytes to the right of 419235-byte region [0x00010a166800,0x00010a1ccda3)
2019-10-11T22:36:48.2287670Z allocated by thread T0 here:
2019-10-11T22:36:48.2287830Z     #0 0x1068cf143 in wrap_malloc (libclang_rt.asan_osx_dynamic.dylib:x86_64+0x59143)
2019-10-11T22:36:48.2287990Z     #1 0x10662c93f in test_gzio_deflate_inflate example.c:245
2019-10-11T22:36:48.2288130Z     #2 0x106637f82 in main example.c:1495
2019-10-11T22:36:48.2288270Z     #3 0x7fff5c1783d4 in start (libdyld.dylib:x86_64+0x163d4)
2019-10-11T22:36:48.2288350Z 
2019-10-11T22:36:48.2288910Z SUMMARY: AddressSanitizer: heap-buffer-overflow crc_folding.c:333 in crc_fold_copy