From 4490d9d1f6d50d2f1e474d2e39f783c39a952c4a Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Thu, 24 Sep 2015 10:31:28 -0700
Subject: [PATCH] Support NaN in path expressions (fix #962)

---
 src/jv.c      | 3 ++-
 tests/jq.test | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/jv.c b/src/jv.c
index 6a446ae3..9c6a868c 100644
--- a/src/jv.c
+++ b/src/jv.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <stdarg.h>
 #include <limits.h>
+#include <math.h>
 
 #include "jv_alloc.h"
 #include "jv.h"
@@ -1302,7 +1303,7 @@ int jv_identical(jv a, jv b) {
       r = a.u.ptr == b.u.ptr;
       break;
     case JV_KIND_NUMBER:
-      r = a.u.number == b.u.number;
+      r = a.u.number == b.u.number || (isnan(a.u.number) && isnan(b.u.number));
       break;
     default:
       r = 1;
diff --git a/tests/jq.test b/tests/jq.test
index 6c75192e..c7c1d371 100644
--- a/tests/jq.test
+++ b/tests/jq.test
@@ -851,6 +851,10 @@ try (def x: reverse; x=10) catch .
 [0,1,2]
 "Invalid path expression with result [2,1,0]"
 
+.[] = 1
+[1,null,Infinity,-Infinity,NaN,-NaN]
+[1,1,1,1,1,1]
+
 #
 # Conditionals
 #