From ea0d107859ea2ba278a17dbb250d883f61918fbb Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 18 May 2016 10:26:55 +1000
Subject: [PATCH] alloc/linear: warn on null src pointers

---
 alloc/linear.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/alloc/linear.cpp b/alloc/linear.cpp
index 1f784a62..4755056c 100644
--- a/alloc/linear.cpp
+++ b/alloc/linear.cpp
@@ -28,6 +28,9 @@ linear::linear (void *begin, void *end):
     m_end    (reinterpret_cast<char*> (end)),
     m_cursor (reinterpret_cast<char*> (begin))
 {
+    CHECK_NEZ (begin);
+    CHECK_NEZ (end);
+
     CHECK_LE (begin, end);
 }
 
@@ -41,6 +44,8 @@ linear::allocate (size_t bytes, size_t alignment)
         throw std::bad_alloc ();
 
     m_cursor = ptr + bytes;
+
+    CHECK_NEZ (ptr);
     return ptr;
 }