From 612c4ad1dcee45a83bfbad78b7a583099024a22a Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Sat, 8 Jan 2022 19:55:14 +0100
Subject: [PATCH] Reviewed possible issue with shaders detaching

---
 src/rlgl.h | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/src/rlgl.h b/src/rlgl.h
index fc5857b8..3ae8575f 100644
--- a/src/rlgl.h
+++ b/src/rlgl.h
@@ -3550,19 +3550,22 @@ unsigned int rlLoadShaderCode(const char *vsCode, const char *fsCode)
     if ((vertexShaderId == RLGL.State.defaultVShaderId) && (fragmentShaderId == RLGL.State.defaultFShaderId)) id = RLGL.State.defaultShaderId;
     else
     {
-        id = rlLoadShaderProgram(vertexShaderId, fragmentShaderId);
+        if ((vertexShaderId != 0) && (fragmentShaderId != 0))
+        {
+            id = rlLoadShaderProgram(vertexShaderId, fragmentShaderId);
 
-        if (vertexShaderId != RLGL.State.defaultVShaderId)
-        {
-            // Detach shader before deletion to make sure memory is freed
-            glDetachShader(id, vertexShaderId);
-            glDeleteShader(vertexShaderId);
-        }
-        if (fragmentShaderId != RLGL.State.defaultFShaderId)
-        {
-            // Detach shader before deletion to make sure memory is freed
-            glDetachShader(id, fragmentShaderId);
-            glDeleteShader(fragmentShaderId);
+            if (vertexShaderId != RLGL.State.defaultVShaderId)
+            {
+                // Detach shader before deletion to make sure memory is freed
+                glDetachShader(id, vertexShaderId);
+                glDeleteShader(vertexShaderId);
+            }
+            if (fragmentShaderId != RLGL.State.defaultFShaderId)
+            {
+                // Detach shader before deletion to make sure memory is freed
+                glDetachShader(id, fragmentShaderId);
+                glDeleteShader(fragmentShaderId);
+            }
         }
 
         if (id == 0)