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-rw-r--r--api_changes.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/api_changes.md b/api_changes.md
index be02e16c..d68a776f 100644
--- a/api_changes.md
+++ b/api_changes.md
@@ -236,7 +236,9 @@ assumptions. If you have added any fields which need very careful formatting
"this slice will always have at least 1 element", you may get an error or even
a panic from the `serialization_test`. If so, look at the diff it produces (or
the backtrace in case of a panic) and figure out what you forgot. Encode that
-into the fuzzer's custom fuzz functions.
+into the fuzzer's custom fuzz functions. Hint: if you added defaults for a field,
+that field will need to have a custom fuzz function that ensures that the field is
+fuzzed to a non-empty value.
The fuzzer can be found in `pkg/api/testing/fuzzer.go`.