support: Report NULL blobs explicitly in TEST_COMPARE
Commit Message
Provide an explicit diagnostic if the length is positive, and
do not just crash with a null pointer dereference. Null pointers
are only valid if the length is zero, so this can only happen with
a faulty test.
2019-05-03 Florian Weimer <fweimer@redhat.com>
* support/support_test_compare_blob.c (report_blob): Report
incorrect NULL blobs.
@@ -33,7 +33,9 @@ static void
report_blob (const char *what, const unsigned char *blob,
unsigned long int length, const char *expr)
{
- if (length > 0)
+ if (blob == NULL)
+ printf (" %s (evaluated from %s): NULL\n", what, expr);
+ else if (length > 0)
{
printf (" %s (evaluated from %s):\n", what, expr);
char *quoted = support_quote_blob (blob, length);