Predator and regressing range did not given any suspected CL. could someone please take a look?.
Thank you.

I am unable to build the fuzzer. Do these steps work for you? (from reproducing.md)

/chrome/src$gn gen out/libfuzzer '--args=is_debug=false use_libfuzzer=true is_asan=true enable_nacl=false proprietary_codecs=true ffmpeg_branding="ChromeOS"'
Done. Made 5441 targets from 1237 files in 1274ms
/chrome/src$ninja -C out/libfuzzer skia_pathop_fuzzer
ninja: Entering directory `out/libfuzzer'
[1290/1290] LINK ./skia_pathop_fuzzer
FAILED: skia_pathop_fuzzer 
python "../../build/toolchain/gcc_link_wrapper.py" --output="./skia_pathop_fuzzer" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -fuse-ld=gold -B../../third_party/binutils/Linux_x64/Release/bin -Wl,--threads -Wl,--thread-count=4 -m64 -pthread -Werror -Wl,-O1 -Wl,--gc-sections --sysroot=../../build/linux/debian_wheezy_amd64-sysroot -L/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/lib/x86_64-linux-gnu -L/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib/x86_64-linux-gnu -L/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -Wl,-rpath-link=/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -L/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib -Wl,-rpath-link=/media/caryclark/5e5fc4d2-2c0d-4ef6-8d8f-4f259a97ab70/chrome/src/build/linux/debian_wheezy_amd64-sysroot/usr/lib -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=leak -fsanitize-coverage=trace-pc-guard -Wl,-rpath-link=. -Wl,--disable-new-dtags -Wl,-rpath=\$ORIGIN/. -Wl,-rpath-link=. -Wl,--export-dynamic -Wl,-u_sanitizer_options_link_helper -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=leak -fsanitize-coverage=trace-pc-guard -stdlib=libc++ -Wl,-rpath,\$ORIGIN/ -L. -o "./skia_pathop_fuzzer" -Wl,--start-group @"./skia_pathop_fuzzer.rsp" ./libc++.so -Wl,--end-group  -ldl -lrt -lgmodule-2.0 -lgobject-2.0 -lgthread-2.0 -lglib-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lfontconfig -lfreetype -lgio-2.0 
../../third_party/libFuzzer/src/FuzzerTracePC.h:64: error: undefined reference to 'fuzzer::ClearExtraCounters()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:64: error: undefined reference to 'fuzzer::ClearExtraCounters()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:64: error: undefined reference to 'fuzzer::ClearExtraCounters()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersBegin()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersBegin()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersBegin()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersEnd()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersEnd()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersEnd()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersBegin()'
../../third_party/libFuzzer/src/FuzzerTracePC.h:147: error: undefined reference to 'fuzzer::ExtraCountersEnd()'

caryclark@, Usually we won't build fuzzers, however we try to find a right owner to troubleshoot these CF failures. Probably finding someone else for this help?

Thank you!

ClusterFuzz testcase 5219634778472448 is flaky and no longer reproduces, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.