Travis: Unbreak the builds.

In the hopes of future-proofing as much as possible, jump to the latest
distribution Travis supports.

test/include/test/test.h

@@ -581,5 +581,3 @@ test_status_t	p_test_no_malloc_init(test_t *t, ...);
 void	p_test_init(const char *name);
 void	p_test_fini(void);
 void	p_test_fail(const char *prefix, const char *message);
-
-void strncpy_cond(void *dst, const char *src, bool cond);

test/src/test.c

@@ -232,16 +232,3 @@ p_test_fail(const char *prefix, const char *message) {
 	malloc_cprintf(NULL, NULL, "%s%s\n", prefix, message);
 	test_status = test_status_fail;
 }
-
-void
-strncpy_cond(void *dst, const char *src, bool cond) {
-	if (cond) {
-		/*
-		 * Avoid strcpy and explicitly set length to 0 because the
-		 * `stringop-overflow` check may warn even if the specific test
-		 * is unreachable.
-		 */
-		size_t n = cond ? strlen(src) + 1 : 0;
-		strncpy(dst, src, n);
-	}
-}

test/unit/fb.c

@@ -473,8 +473,8 @@ static void
 expect_iter_results_at(fb_group_t *fb, size_t nbits, size_t pos,
     bool val, bool forward) {
 	bool iter_res;
-	size_t iter_begin;
-	size_t iter_len;
+	size_t iter_begin JEMALLOC_CC_SILENCE_INIT(0);
+	size_t iter_len JEMALLOC_CC_SILENCE_INIT(0);
 	if (val) {
 		if (forward) {
 			iter_res = fb_srange_iter(fb, nbits, pos,

test/unit/log.c

@@ -4,7 +4,7 @@
 
 static void
 update_log_var_names(const char *names) {
-	strncpy_cond(log_var_names, names, config_log);
+	strncpy(log_var_names, names, sizeof(log_var_names));
 }
 
 static void