CB* series of functions as well Bprint might cause core dump, in case if BFLD_FLOAT or BFLD_DOUBLE fields string representation takes more than 63 symbols.
Mainly this affects vast numbers, as places after the comma are limited to 5 (for float) and 6 (for doubles).

Issue is related with temporary space for type conversion which currently is 64 (CF_TEMP_BUF_MAX) and that can make macros like:

#define CONV_TO_STRING(X, C) \
    if (CNV_DIR_OUT==cnv_dir && NULL!=out_len)\
    {\
        char tmp[CF_TEMP_BUF_MAX+1];\
        sprintf(tmp, X, (C)*ptr);\
        len = strlen(tmp)+1; /* Including EOS! */\
        if (*out_len<len)\
        {\
            ndrx_Bset_error_fmt(BNOSPACE, "data size: %d specified: %d", len, *out_len);\
            return NULL;\
        }\
        else\
        {\
            strcpy(output_buf, tmp);\
        }\
    }\
    else\
    {\
        /* In case if converting in, we have space for trailing EOS! */\
        sprintf(output_buf, X, (C)*ptr);\
        if (NULL!=out_len) /* In case if we really need it! */\
            len = strlen(output_buf)+1;\
    }\
    if (NULL!=out_len)\
        *out_len = len;\

to overflow the buffer.