From 41ef42ee94f34c46ccdb9f56991fc0fe94c779df Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 15 Mar 2018 15:00:12 +1030
Subject: [PATCH] memdump: fix overzealous assertions from
 b857b2e8438ad86f6c69c40ec3e4db3ab6a4542a

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 lightningd/memdump.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lightningd/memdump.c b/lightningd/memdump.c
index fba264e04..d2d536c23 100644
--- a/lightningd/memdump.c
+++ b/lightningd/memdump.c
@@ -73,8 +73,10 @@ static int json_add_syminfo(void *data, uintptr_t pc UNUSED,
 	struct json_result *response = data;
 	char *str;
 
-	assert(filename != NULL);
-	assert(function != NULL);
+	/* This can happen in backtraces. */
+	if (!filename || !function)
+		return 0;
+
 	str = tal_fmt(response, "%s:%u (%s)", filename, lineno, function);
 	json_add_string(response, NULL, str);
 	tal_free(str);