lib-test: test_istream_find - Ensure that stream is not NULL

diff --git a/src/lib-test/test-istream.c b/src/lib-test/test-istream.c
index 1d20748645da32538bc16d4b40504cbaaf915dce..99756c12280e61774dbc0cb9f976600bb4549ebf 100644 (file)
--- a/src/lib-test/test-istream.c
+++ b/src/lib-test/test-istream.c
@@ -135,6 +135,8 @@ static struct test_istream *test_istream_find(struct istream *input)
 {
        struct istream *in;
 
+       i_assert(input != NULL);
+
        for (in = input; in != NULL; in = in->real_stream->parent) {
                if (in->real_stream->read == test_read)
                        return (struct test_istream *)in->real_stream;