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-rw-r--r--src/mesa/vbo/vbo_exec_draw.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mesa/vbo/vbo_exec_draw.c b/src/mesa/vbo/vbo_exec_draw.c
index 5442a409ad4..bfe9ef0a483 100644
--- a/src/mesa/vbo/vbo_exec_draw.c
+++ b/src/mesa/vbo/vbo_exec_draw.c
@@ -327,9 +327,10 @@ vbo_exec_vtx_map( struct vbo_exec_context *exec )
0, VBO_VERT_BUFFER_SIZE,
accessRange,
exec->vtx.bufferobj);
- else
+ if (!exec->vtx.buffer_map)
exec->vtx.buffer_map =
(GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
+ assert(exec->vtx.buffer_map);
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
}