From 672dc6368a46c4aaeaecffdd3b09d9a336d761da Mon Sep 17 00:00:00 2001
From: Thomas Brandon <tbrandonau@gmail.com>
Date: Mon, 3 Jun 2019 02:42:17 +1000
Subject: [PATCH] Fix segfault passing null to sox_close

---
 torchaudio/torch_sox.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/torchaudio/torch_sox.cpp b/torchaudio/torch_sox.cpp
index 92241dcbee..b6cc4bbb3b 100644
--- a/torchaudio/torch_sox.cpp
+++ b/torchaudio/torch_sox.cpp
@@ -18,7 +18,9 @@ struct SoxDescriptor {
   SoxDescriptor& operator=(const SoxDescriptor& other) = delete;
   SoxDescriptor& operator=(SoxDescriptor&& other) = delete;
   ~SoxDescriptor() {
-    sox_close(fd_);
+    if (fd_ != nullptr) {
+      sox_close(fd_);
+    }
   }
   sox_format_t* operator->() noexcept {
     return fd_;