ci: add LLVM_SYMBOLIZER_PATH to Valgrind fuzz job #30961

1. 
   fanquake commented at 4:06 pm on September 24, 2024: member

   Otherwise:

   0	NEW_FUNC[1/23]: ==4710==WARNING: invalid path to external symbolizer!
   1==4710==WARNING: Failed to use and restart external symbolizer!
   20xb72010  (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz/fuzz+0xa6a010) (BuildId: 2087ad415cb752eea259ed750f3b78a7fcb0b43b)
   3	NEW_FUNC[2/23]: 0xb72240  (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz/fuzz+0xa6a240) (BuildId: 2087ad415cb752eea259ed750f3b78a7fcb0b43b)
   

2. ci: add LLVM_SYMBOLIZER_PATH to Valgrind fuzz job

   Otherwise:
   ```bash
   	NEW_FUNC[1/23]: ==4710==WARNING: invalid path to external symbolizer!
   ==4710==WARNING: Failed to use and restart external symbolizer!
   0xb72010  (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz/fuzz+0xa6a010) (BuildId: 2087ad415cb752eea259ed750f3b78a7fcb0b43b)
   	NEW_FUNC[2/23]: 0xb72240  (/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz/fuzz+0xa6a240) (BuildId: 2087ad415cb752eea259ed750f3b78a7fcb0b43b)
   
   ```

   c1832584bf
3. 
   DrahtBot commented at 4:06 pm on September 24, 2024: contributor

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4. DrahtBot added the label Tests on Sep 24, 2024
5. 
   theuni commented at 8:19 pm on September 25, 2024: member

   Makes sense to me. I assume this could also be solved with a symlink or update-alternatives, but even if so, using the env var seems simpler.
6. 
   maflcko commented at 6:31 am on September 26, 2024: member

   Otherwise:

   Can you explain this a bit better? The CI task is passing, see https://cirrus-ci.com/task/6297362342084608

   So I presume this is just for the case when an error happens, because otherwise the symbolizer wouldn’t be asked?

7. 
   fanquake commented at 6:44 am on September 26, 2024: member

   So I presume this is just for the case when an error happens, because otherwise the symbolizer wouldn’t be asked?

   Yea. Or fuzzing with no corpus. https://cirrus-ci.com/task/6297362342084608?logs=ci#L2903.

8. 
   maflcko commented at 6:50 am on September 26, 2024: member

   review ACK c1832584bfd1b352095bc41a13ff17564e456d43
9. fanquake merged this on Sep 26, 2024
10. fanquake closed this on Sep 26, 2024

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11. fanquake deleted the branch on Sep 26, 2024

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fanquake DrahtBot theuni maflcko

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