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[docs] Reproducing: clarify that reproduce command works only with libfuzzer (#4497). (#4504) 

The change was proposed by @pauldreik in https://github.com/google/oss-fuzz/issues/4497#issuecomment-703075579
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Max Moroz 2020-10-05 12:53:37 -07:00 committed by GitHub
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docs/advanced-topics/reproducing.md
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@ -93,6 +93,9 @@ After you build an image and a fuzzer, you can reproduce a bug by running the fo
$ python infra/helper.py reproduce $PROJECT_NAME <fuzz_target_name> <testcase_path>
```
**Note**: The reproduce command only supports `libfuzzer` fuzzing engine. Crashes
found with other fuzzing engines should be reproducible with `libfuzzer` too.
For example, to build the [libxml2](https://github.com/google/oss-fuzz/tree/master/projects/libxml2)
project with UndefinedBehaviorSanitizer (`undefined`) instrumentation and
reproduce a crash testcase for a fuzzer named `libxml2_xml_read_memory_fuzzer`,