==13==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 1552 byte(s) in 2 object(s) allocated from:
    #0 0x55d12b7bb8ee in malloc /src/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:69:3
    #1 0x55d12c876154 in aom_memalign /src/aom/aom_mem/aom_mem.c:59:22
    #2 0x55d12c8743f9 in img_alloc_helper /src/aom/aom/src/aom_image.c:155:34
    #3 0x55d12c873b46 in aom_img_alloc /src/aom/aom/src/aom_image.c:198:10
    #4 0x55d12c7fe4f2 in aom_encode_image(void*, heif_image const*, heif_image_input_class) /src/libheif/libheif/plugins/encoder_aom.cc:802:8
    #5 0x55d12c7bf889 in ImageItem_AVIF::encode(std::__1::shared_ptr<HeifPixelImage> const&, heif_encoder*, heif_encoding_options const&, heif_image_input_class) /src/libheif/libheif/codecs/avif.cc:580:27
    #6 0x55d12c5cc9b3 in ImageItem::encode_to_bitstream_and_boxes(std::__1::shared_ptr<HeifPixelImage> const&, heif_encoder*, heif_encoding_options const&, heif_image_input_class) /src/libheif/libheif/codecs/image_item.cc:187:52
    #7 0x55d12c5d2bc8 in ImageItem::encode_to_item(HeifContext*, std::__1::shared_ptr<HeifPixelImage> const&, heif_encoder*, heif_encoding_options const&, heif_image_input_class) /src/libheif/libheif/codecs/image_item.cc:333:41
    #8 0x55d12c72ca38 in HeifContext::encode_image(std::__1::shared_ptr<HeifPixelImage> const&, heif_encoder*, heif_encoding_options const&, heif_image_input_class, std::__1::shared_ptr<ImageItem>&) /src/libheif/libheif/context.cc:1081:27
    #9 0x55d12c5a93d4 in heif_context_encode_image /src/libheif/libheif/api/libheif/heif.cc:3148:25
    #10 0x55d12b938464 in vips_foreign_save_heif_write_page /src/libvips/build/../libvips/foreign/heifsave.c:318:11
    #11 0x55d12b938464 in vips_foreign_save_heif_write_block /src/libvips/build/../libvips/foreign/heifsave.c:470:8
    #12 0x55d12b815999 in wbuffer_write /src/libvips/build/../libvips/iofuncs/sinkdisc.c:174:25
    #13 0x55d12b815999 in wbuffer_write_thread /src/libvips/build/../libvips/iofuncs/sinkdisc.c:199:3
    #14 0x55d12bbe56e3 in vips_threadset_work /src/libvips/build/../libvips/iofuncs/threadset.c:134:3
    #15 0x55d12b7fb1d0 in vips_thread_run /src/libvips/build/../libvips/iofuncs/thread.c:148:11
    #16 0x55d12bc136f0 in g_thread_proxy (/out/generic_buffer_with_args_fuzzer+0xbe26f0)

vips copy test/test-suite/images/favicon.ico out.avif[bitdepth=16]