row0sel.c, page0page.ic:

  Add diagnostic code to print hex dumps and track corruption of next record offsets in an index page

innobase/include/page0page.ic

@@ -479,7 +479,15 @@ page_rec_get_next(
 
 	offs = rec_get_next_offs(rec);
 
-	ut_a(offs < UNIV_PAGE_SIZE);
+	if (offs >= UNIV_PAGE_SIZE) {
+		fprintf(stderr,
+"InnoDB: Next record offset is nonsensical %lu in record at offset %lu\n",
+		(ulong)offs, (ulong)(rec - page));
+	
+		buf_page_print(page);
+
+		ut_a(0);
+	}
 
 	if (offs == 0) {
 		

innobase/row/row0sel.c

@@ -3088,6 +3088,7 @@ rec_loop:
 
 		if (srv_force_recovery == 0 || moves_up == FALSE) {
 			ut_print_timestamp(stderr);
+			buf_page_print(buf_frame_align(rec));
 			fprintf(stderr,
 "  InnoDB: Index corruption: rec offs %lu next offs %lu, page no %lu,\n"
 "InnoDB: ",