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-rw-r--r--vpp-api-test/vat/api_format.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/vpp-api-test/vat/api_format.c b/vpp-api-test/vat/api_format.c
index 0c0a65e0dd3..b6f09021d5b 100644
--- a/vpp-api-test/vat/api_format.c
+++ b/vpp-api-test/vat/api_format.c
@@ -2428,7 +2428,8 @@ int exec (vat_main_t * vam)
while (vat_time_now (vam) < timeout) {
if (vam->result_ready == 1) {
u8 * free_me;
- fformat (vam->ofp, "%s", vam->shmem_result);
+ if (vam->shmem_result != NULL)
+ fformat (vam->ofp, "%s", vam->shmem_result);
pthread_mutex_lock (&am->vlib_rp->mutex);
oldheap = svm_push_data_heap (am->vlib_rp);