From 415dc5482000db2fecdef45ca5d728c9c72a50b9 Mon Sep 17 00:00:00 2001
From: Tom Poole <thomas.poole@roli.com>
Date: Fri, 30 Nov 2018 15:49:03 +0000
Subject: [PATCH] Protected the system Random from having its seed reset

---
 modules/juce_core/maths/juce_Random.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/modules/juce_core/maths/juce_Random.cpp b/modules/juce_core/maths/juce_Random.cpp
index 219e1b40c8..020252a13d 100644
--- a/modules/juce_core/maths/juce_Random.cpp
+++ b/modules/juce_core/maths/juce_Random.cpp
@@ -38,6 +38,16 @@ Random::~Random() noexcept
 
 void Random::setSeed (const int64 newSeed) noexcept
 {
+    if (this == &getSystemRandom())
+    {
+        // Resetting the system Random risks messing up
+        // JUCE's internal state. If you need a predictable
+        // stream of random numbers you should use a local
+        // Random object.
+        jassertfalse;
+        return;
+    }
+
     seed = newSeed;
 }