From 3b5d2b7da06c32b15d2a524f84974081b233da50 Mon Sep 17 00:00:00 2001
From: Timo Kokkonen <kaapeli@itanic.dy.fi>
Date: Tue, 7 Dec 2010 21:57:00 +0200
Subject: [PATCH] quadtree.c: Print line number when trap is caught

This helps debugging

Signed-off-by: Timo Kokkonen <kaapeli@itanic.dy.fi>
---
 quadtree.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/quadtree.c b/quadtree.c
index 80b285a..79039c6 100644
--- a/quadtree.c
+++ b/quadtree.c
@@ -9,12 +9,18 @@
 #define debug 0
 #endif
 
-static void trap(void)
+static void _trap(int line)
 {
-	if (debug)
+	if (debug) {
+		printf("Trapped from line %d, use debugger to get backtrace\n",
+			line);
+		fflush(stdout);
 		exit(1);
+	}
 }
 
+#define trap() _trap(__LINE__)
+
 static int quadtree_compare_coord(const struct vector *a,
 				const struct vector *b)
 {
-- 
2.45.0