libavcodec/hqx.c:209: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read`.

libavcodec/hqx.c:209:29: Call
207.             flag = bitstream_read_bit(bc);
208. 
209.         quants = hqx_quants[bitstream_read(bc, 4)];
                                 ^
210. 
211.         cbp |= cbp << 4; // alpha CBP

libavcodec/bitstream.h:183:1: Parameter `n`
  181. 
  182. /* Return n bits from the buffer. n has to be in the 0-32 range. */
  183. static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)
       ^
  184. {
  185.     if (!n)

libavcodec/bitstream.h:194:12: Call
  192.     }
  193. 
  194.     return get_val(bc, n);
                  ^
  195. }
  196. 

libavcodec/bitstream.h:130:1: <LHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `bc->bits_left`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: <RHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `n`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:139:5: Binary operation: ([1, +oo] - 4):unsigned32 by call to `bitstream_read` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;

static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
{
#ifdef BITSTREAM_READER_LE
    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);
    bc->bits >>= n;
#else
    uint64_t ret = bc->bits >> (64 - n);
    bc->bits <<= n;
#endif
    bc->bits_left -= n;
    return ret;
}
['static int hqx_decode_422a(HQXContext *ctx, int slice_no, int x, int y)\n{\n    HQXSlice *slice = &ctx->slice[slice_no];\n    BitstreamContext *bc = &slice->bc;\n    const int *quants;\n    int flag = 0;\n    int last_dc;\n    int i, ret;\n    int cbp;\n    cbp = bitstream_read_vlc(bc, ctx->cbp_vlc.table, ctx->cbp_vlc.bits, 1);\n    for (i = 0; i < 12; i++)\n        memset(slice->block[i], 0, sizeof(**slice->block) * 64);\n    for (i = 0; i < 12; i++)\n        slice->block[i][0] = -0x800;\n    if (cbp) {\n        if (ctx->interlaced)\n            flag = bitstream_read_bit(bc);\n        quants = hqx_quants[bitstream_read(bc, 4)];\n        cbp |= cbp << 4;\n        if (cbp & 0x3)\n            cbp |= 0x500;\n        if (cbp & 0xC)\n            cbp |= 0xA00;\n        for (i = 0; i < 12; i++) {\n            if (i == 0 || i == 4 || i == 8 || i == 10)\n                last_dc = 0;\n            if (cbp & (1 << i)) {\n                int vlc_index = ctx->dcb - 9;\n                ret = decode_block(bc, &ctx->dc_vlc[vlc_index], quants,\n                                   ctx->dcb, slice->block[i], &last_dc);\n                if (ret < 0)\n                    return ret;\n            }\n        }\n    }\n    put_blocks(ctx, 3, x,      y, flag, slice->block[ 0], slice->block[ 2], hqx_quant_luma);\n    put_blocks(ctx, 3, x + 8,  y, flag, slice->block[ 1], slice->block[ 3], hqx_quant_luma);\n    put_blocks(ctx, 0, x,      y, flag, slice->block[ 4], slice->block[ 6], hqx_quant_luma);\n    put_blocks(ctx, 0, x + 8,  y, flag, slice->block[ 5], slice->block[ 7], hqx_quant_luma);\n    put_blocks(ctx, 2, x >> 1, y, flag, slice->block[ 8], slice->block[ 9], hqx_quant_chroma);\n    put_blocks(ctx, 1, x >> 1, y, flag, slice->block[10], slice->block[11], hqx_quant_chroma);\n    return 0;\n}', 'static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)\n{\n    if (!n)\n        return 0;\n    if (n > bc->bits_left) {\n        refill_32(bc);\n        if (bc->bits_left < 32)\n            bc->bits_left = n;\n    }\n    return get_val(bc, n);\n}', 'static inline uint64_t get_val(BitstreamContext *bc, unsigned n)\n{\n#ifdef BITSTREAM_READER_LE\n    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);\n    bc->bits >>= n;\n#else\n    uint64_t ret = bc->bits >> (64 - n);\n    bc->bits <<= n;\n#endif\n    bc->bits_left -= n;\n    return ret;\n}']