ut0dbg.h:

  Print the failing assertion if it fails; helps to analyze bug reports

innobase/include/ut0dbg.h

@@ -20,7 +20,6 @@ extern ibool	ut_dbg_stop_threads;
 
 extern ulint*	ut_dbg_null_ptr;
 
-				
 #define ut_a(EXPR)\
 {\
 	ulint	dbg_i;\
@@ -32,7 +31,9 @@ extern ulint*	ut_dbg_null_ptr;
 		os_thread_pf(os_thread_get_curr_id()), IB__FILE__,\
                 (ulint)__LINE__);\
 		fprintf(stderr,\
-       "InnoDB: We intentionally generate a memory trap.\n");\
+       "InnoDB: Failing assertion: " #EXPR);\
+	   	fprintf(stderr,\
+       "\nInnoDB: We intentionally generate a memory trap.\n");\
                 fprintf(stderr,\
        "InnoDB: Send a detailed bug report to mysql@lists.mysql.com\n");\
 		ut_dbg_stop_threads = TRUE;\