libavfilter/vf_fade.c:94: error: Null Dereference
  pointer `pixdesc` last assigned on line 92 could be null and is dereferenced at line 94, column 18.

libavfilter/vf_fade.c:89:1: start of procedure config_props()
87. }
88. 
89. static int config_props(AVFilterLink *inlink)
    ^
90. {
91.     FadeContext *fade = inlink->dst->priv;

libavfilter/vf_fade.c:91:5: 
89. static int config_props(AVFilterLink *inlink)
90. {
91.     FadeContext *fade = inlink->dst->priv;
        ^
92.     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
93. 

libavfilter/vf_fade.c:92:5: 
90. {
91.     FadeContext *fade = inlink->dst->priv;
92.     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
        ^
93. 
94.     fade->hsub = pixdesc->log2_chroma_w;

libavutil/pixdesc.c:1199:1: start of procedure av_pix_fmt_desc_get()
  1197. }
  1198. 
  1199. const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
        ^
  1200. {
  1201.     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)

libavutil/pixdesc.c:1201:9: Taking false branch
  1199. const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
  1200. {
  1201.     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
                ^
  1202.         return NULL;
  1203.     return &av_pix_fmt_descriptors[pix_fmt];

libavutil/pixdesc.c:1201:24: Taking true branch
  1199. const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
  1200. {
  1201.     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
                               ^
  1202.         return NULL;
  1203.     return &av_pix_fmt_descriptors[pix_fmt];

libavutil/pixdesc.c:1202:9: 
  1200. {
  1201.     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
  1202.         return NULL;
                ^
  1203.     return &av_pix_fmt_descriptors[pix_fmt];
  1204. }

libavutil/pixdesc.c:1204:1: return from a call to av_pix_fmt_desc_get
  1202.         return NULL;
  1203.     return &av_pix_fmt_descriptors[pix_fmt];
  1204. }
        ^
  1205. 
  1206. const AVPixFmtDescriptor *av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev)

libavfilter/vf_fade.c:94:5: 
92.     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
93. 
94.     fade->hsub = pixdesc->log2_chroma_w;
        ^
95.     fade->vsub = pixdesc->log2_chroma_h;
96. 

static int config_props(AVFilterLink *inlink)
{
    FadeContext *fade = inlink->dst->priv;
    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
    fade->hsub = pixdesc->log2_chroma_w;
    fade->vsub = pixdesc->log2_chroma_h;
    fade->bpp = av_get_bits_per_pixel(pixdesc) >> 3;
    return 0;
}
['static int config_props(AVFilterLink *inlink)\n{\n    FadeContext *fade = inlink->dst->priv;\n    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);\n    fade->hsub = pixdesc->log2_chroma_w;\n    fade->vsub = pixdesc->log2_chroma_h;\n    fade->bpp = av_get_bits_per_pixel(pixdesc) >> 3;\n    return 0;\n}', 'const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)\n{\n    if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)\n        return NULL;\n    return &av_pix_fmt_descriptors[pix_fmt];\n}']