Index: /trunk/src/VBox/Devices/Graphics/shaderlib/glsl_shader.c
===================================================================
--- /trunk/src/VBox/Devices/Graphics/shaderlib/glsl_shader.c	(revision 80546)
+++ /trunk/src/VBox/Devices/Graphics/shaderlib/glsl_shader.c	(revision 80547)
@@ -340,4 +340,10 @@
     WDLOG(("    GL_OBJECT_COMPILE_STATUS_ARB: %d.\n", tmp));
     WDLOG(("\n"));
+
+    if (tmp == 0)
+    {
+        /* Compilation error, print the compiler's error messages. */
+        print_glsl_info_log(gl_info, shader);
+    }
 
     ptr = source;