Follow-up Comment #1, bug #57277 (project findutils):
First of all, the fix for this should go into gnulib --> adding their ML.
Then, this test actually wants to verify the behavior of that
function when called with a NULL value (it should return NULL
and set errno to EINVAL).
Therefore, the test needs to suppress that specific sanitizer
error. I don't have a GCC 10, so does something like the
following work?
a/tests/test-canonicalize-lgpl.c b/tests/test-canonicalize-lgpl.c
index 4ce06e46c..4e7d47c57 100644
--- a/tests/test-canonicalize-lgpl.c
+++ b/tests/test-canonicalize-lgpl.c
@@ -39,6 +39,9 @@ SIGNATURE_CHECK (canonicalize_file_name, char *, (const char
*));
#define BASE "t-can-lgpl.tmp"
+/* Suppress -fsanitize=null error - seen on GCC 10 - for this test. */
+extern char *canonicalize_file_name (const char *)
__attribute__((no_sanitize("null")));
+
int
main (void)
{
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