Closing the database after the iterator is created is not a problem.
---
test/T566-lib-message.sh | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/test/T566-lib-message.sh b/test/T566-lib-message.sh
index 3b0e85b5..0ba601f9 100755
--- a/test/T566-lib-message.sh
+++ b/test/T566-lib-message.sh
@@ -138,6 +138,29 @@ cat <<EOF > EXPECTED
EOF
test_expect_equal_file EXPECTED OUTPUT
+test_begin_subtest "iterate over all message filenames from closed database"
+cat c_head0 - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ notmuch_filenames_t *filenames;
+ filenames = notmuch_message_get_filenames (message);
+ EXPECT0(notmuch_database_close (db));
+ for (; notmuch_filenames_valid (filenames);
+ notmuch_filenames_move_to_next (filenames)) {
+ const char *filename = notmuch_filenames_get (filenames);
+ printf("%s\n", filename);
+ }
+ notmuch_filenames_destroy (filenames);
+ printf("SUCCESS\n");
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+MAIL_DIR/01:2,
+SUCCESS
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
test_begin_subtest "Handle getting ghost flag from closed database"
cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
{
--
2.27.0
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