From dd8265bf9edc7499201506055452559351fad3f4 Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Tue, 24 Aug 2021 17:09:20 +0100
Subject: [PATCH] Add extra protection against invalid buffers in buffer viewer

---
 qrenderdoc/Windows/BufferViewer.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/qrenderdoc/Windows/BufferViewer.cpp b/qrenderdoc/Windows/BufferViewer.cpp
index cd4905513..28259f3c4 100644
--- a/qrenderdoc/Windows/BufferViewer.cpp
+++ b/qrenderdoc/Windows/BufferViewer.cpp
@@ -2673,8 +2673,14 @@ void BufferViewer::OnEventChanged(uint32_t eventId)
         rangeEnd = UINT64_MAX;
 
       // get the underlying buffer length
-      uint64_t bufferLength =
-          m_IsBuffer && m_BufferID != ResourceId() ? m_Ctx.GetBuffer(m_BufferID)->length : 0;
+      uint64_t bufferLength = 0;
+
+      if(m_IsBuffer && m_BufferID != ResourceId())
+      {
+        const BufferDescription *desc = m_Ctx.GetBuffer(m_BufferID);
+        if(desc)
+          bufferLength = desc->length;
+      }
 
       // clamp the range to the buffer length, which may end up with it being empty
       rangeEnd = qMin(rangeEnd, bufferLength);