should be it

external/duckdb/test/fuzzer/pedro/alter_column_generated.test

@@ -0,0 +1,39 @@
+# name: test/fuzzer/pedro/alter_column_generated.test
+# description: Issue #4677: heap-buffer-overflow on ALTER statement
+# group: [pedro]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE t0(c0 AS (1), c1 INT);
+
+statement ok
+ALTER TABLE t0 ALTER c1 SET NOT NULL;
+
+statement ok
+ALTER TABLE t0 ALTER c1 SET NOT NULL;
+
+statement error
+ALTER TABLE t0 ALTER c0 SET NOT NULL;
+----
+<REGEX>:Binder Error.*Unsupported constraint.*
+
+statement error
+INSERT INTO t0 VALUES (NULL);
+----
+<REGEX>:Constraint Error.*NOT NULL.*failed.*
+
+statement ok
+DROP TABLE t0;
+
+statement ok
+CREATE TABLE t0(c0 AS (1), c1 INT);
+
+statement ok
+INSERT INTO t0 VALUES (NULL);
+
+statement error
+ALTER TABLE t0 ALTER c1 SET NOT NULL;
+----
+<REGEX>:Constraint Error.*NOT NULL.*failed.*