fuzz: exercise ComputeMerkleRoot without mutated parameter #34050

1. 
   l0rinc commented at 11:50 am on December 11, 2025: contributor

   The mutated parameter in ComputeMerkleRoot unlocks a different path that was always exercised in the fuzz test. Adjusted to be fuzzer to pass nullptr as well to make sure that path is also tested: https://github.com/bitcoin/bitcoin/blob/24ed820d4f0d8f7fa2f69e1909c2d98f809d2f94/src/consensus/merkle.cpp#L49-L53

   Follow-up to #33805 (review)

2. fuzz: exercise `ComputeMerkleRoot` without mutated parameter

   Co-authored-by: sedited <seb.kung@gmail.com>

   7e9de20c0c
3. DrahtBot added the label Tests on Dec 11, 2025
4. 
   DrahtBot commented at 11:50 am on December 11, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/34050.

   Reviews

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   Type	Reviewers
   ACK	hodlinator, frankomosh, sedited

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5. hodlinator approved
6. 
   hodlinator commented at 1:59 pm on December 11, 2025: contributor

   ACK 7e9de20c0c144f5ccea5efe6d90601dd72bc7461
7. 
   frankomosh commented at 4:06 pm on December 11, 2025: contributor

   ACK 7e9de20
8. sedited approved
9. 
   sedited commented at 12:29 pm on December 16, 2025: contributor

   ACK 7e9de20c0c144f5ccea5efe6d90601dd72bc7461
10. fanquake added the label Fuzzing on Dec 16, 2025
11. fanquake merged this on Dec 16, 2025
12. fanquake closed this on Dec 16, 2025

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13. l0rinc deleted the branch on Dec 16, 2025

Contributors
l0rinc DrahtBot hodlinator frankomosh sedited

Labels
Tests Fuzzing