str: use assert to mark impossible cases

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/str.c b/lib/str.c
index 9c3503224d..dc131818a3 100644
--- a/lib/str.c
+++ b/lib/str.c
@@ -99,6 +99,7 @@ void _gnutls_buffer_clear(gnutls_buffer_st * str)
 static void align_allocd_with_data(gnutls_buffer_st * dest)
 {
 	assert(dest->allocd != NULL);
+	assert(dest->data != NULL);
 	if (dest->length)
 		memmove(dest->allocd, dest->data, dest->length);
 	dest->data = dest->allocd;
@@ -154,6 +155,7 @@ gnutls_buffer_append_data(gnutls_buffer_t dest, const void *data,
 
 		align_allocd_with_data(dest);
 	}
+	assert(dest->data != NULL);
 
 	memcpy(&dest->data[dest->length], data, data_size);
 	dest->length = tot_len;