Make the text when reporting a broken region more useful

diff --git a/pixman/pixman-region.c b/pixman/pixman-region.c
index 387dbba..1c5ef8d 100644 (file)
--- a/pixman/pixman-region.c
+++ b/pixman/pixman-region.c
@@ -74,7 +74,7 @@
 #elif defined PIXMAN_REGION_LOG_FAILURES
 
 static void
-log_region_error (void)
+log_region_error (const char *function, const char *message)
 {
     static int n_messages = 0;
 
@@ -82,8 +82,9 @@ log_region_error (void)
     {
        fprintf (stderr,
                 "*** BUG ***\n"
-                "Malformed region detected\n"
-                "Set a breakpoint on 'log_region_error' to debug\n\n");
+                "%s: %s\n"
+                "Set a breakpoint on 'log_region_error' to debug\n\n",
+                 function, message);
 
        n_messages++;
     }
@@ -93,7 +94,7 @@ log_region_error (void)
     do                                                                 \
     {                                                                  \
        if (!PREFIX (_selfcheck (reg)))                                 \
-           log_region_error ();                                        \
+           log_region_error (FUNC, "Malformed region " # reg);         \
     } while (0)
 
 #else