Fuzz: Add curated seed corpus - #2530
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54 hand-written seeds cover the statement grammar, comments, quoting and dialect-specific syntax. 141 statements are sampled and deduplicated from the dialect datasets of LucaCappelletti94/sql_ast_benchmark, re-licensed from MIT to Apache-2.0 by the same sole author. build.sh packages the seeds as <target>_seed_corpus.zip so ClusterFuzzLite code-change and batch runs start from them. Every seed parses under at least one of the 14 fuzzed dialects and round-trips cleanly through Display.
LucaCappelletti94
added this pull request to stack #2529
September 19, 2026 08:17
LucaCappelletti94
marked this pull request as ready for review
September 19, 2026 08:26
This was referenced Sep 19, 2026
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Step 4 of #2519, stacked on the roundtrip harness branch.
Adds 195 seed inputs in
fuzz/fuzz_seeds/, with some from https://github.com/LucaCappelletti94/sql_ast_benchmark and others from the test suite.build.shnow packages the directory as<target>_seed_corpus.zipnext to each binary, which is the OSS-Fuzz and ClusterFuzzLite convention, so code-change and batch runs start from it instead of from random bytes.fuzz/fuzz_seeds/*is added to the RAT exclusions.With this hot-start, the
fuzz_parse_sqlandfuzz_parse_roundtripharnesses reach cov 10938 edges (previously 3238) and 12579 (previously 3360) respectively, in the same 30 seconds window.The cluster CI job finally starts to actually mine bugs :)