| Index: source/libvpx/vp9/encoder/vp9_mbgraph.c
 | 
| diff --git a/source/libvpx/vp9/encoder/vp9_mbgraph.c b/source/libvpx/vp9/encoder/vp9_mbgraph.c
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| index 18a8c72c48d6e3dd749e46b0acf88a684d8278cf..b3a8df924fe77370e13163da8cc73d520683b382 100644
 | 
| --- a/source/libvpx/vp9/encoder/vp9_mbgraph.c
 | 
| +++ b/source/libvpx/vp9/encoder/vp9_mbgraph.c
 | 
| @@ -376,6 +376,8 @@ void vp9_update_mbgraph_stats(VP9_COMP *cpi) {
 | 
|    int i, n_frames = vp9_lookahead_depth(cpi->lookahead);
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|    YV12_BUFFER_CONFIG *golden_ref = get_ref_frame_buffer(cpi, GOLDEN_FRAME);
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|  
 | 
| +  assert(golden_ref != NULL);
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| +
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|    // we need to look ahead beyond where the ARF transitions into
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|    // being a GF - so exit if we don't look ahead beyond that
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|    if (n_frames <= cpi->rc.frames_till_gf_update_due)
 | 
| 
 |