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fa07ac48d8ci: Asan with -ftrivial-auto-var-init=pattern (MarcoFalke) Pull request description: This makes memory bugs deterministic. `-ftrivial-auto-var-init=pattern` is incompatible with other memory sanitizers (like valgrind and msan), but that is irrelevant here, because the address sanitizer in this fuzz CI config is already incompatible with them. `-ftrivial-auto-var-init=pattern` goes well with `-fsanitize=bool` and `-fsanitize=enum`, but those are already enabled via `-fsanitize=undefined`. See https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html#available-checks ACKs for top commit: fanquake: ACKfa07ac48d8- going to get back to fixing up the cxxflags usage in CI, but not a blocker here: Tree-SHA512: 2ea6c5128a9cd262bdd1b1475c7e1be23ce2c520fad05f6c2aace6c29e203573323c0564d272e25da35ad5ff46fde488a5eae1ed14d3349e793d14a5e2533fb1