libavcodec/vp9dsp.c:640: error: Buffer Overrun L2
  Offset added: [0, 62] (⇐ [0, 31] + [0, 31]) Size: 31.

libavcodec/vp9dsp.c:640:1: <Offset trace>
638. def_diag_downleft(8)
639. def_diag_downleft(16)
640. def_diag_downleft(32)
     ^
641. 
642. static void diag_downright_4x4_c(uint8_t *dst, ptrdiff_t stride,

libavcodec/vp9dsp.c:640:1: Assignment
638. def_diag_downleft(8)
639. def_diag_downleft(16)
640. def_diag_downleft(32)
     ^
641. 
642. static void diag_downright_4x4_c(uint8_t *dst, ptrdiff_t stride,

libavcodec/vp9dsp.c:640:1: <Length trace>
638. def_diag_downleft(8)
639. def_diag_downleft(16)
640. def_diag_downleft(32)
     ^
641. 
642. static void diag_downright_4x4_c(uint8_t *dst, ptrdiff_t stride,

libavcodec/vp9dsp.c:640:1: Array declaration
638. def_diag_downleft(8)
639. def_diag_downleft(16)
640. def_diag_downleft(32)
     ^
641. 
642. static void diag_downright_4x4_c(uint8_t *dst, ptrdiff_t stride,

libavcodec/vp9dsp.c:640:1: Array access: Offset added: [0, 62] (⇐ [0, 31] + [0, 31]) Size: 31
638. def_diag_downleft(8)
639. def_diag_downleft(16)
640. def_diag_downleft(32)
     ^
641. 
642. static void diag_downright_4x4_c(uint8_t *dst, ptrdiff_t stride,
