src/http/modules/ngx_http_index_module.c:215: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_open_cached_file`.

src/http/modules/ngx_http_index_module.c:147:13: Unknown value from: __infer_skip
145. 
146.         } else {
147.             ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
                 ^
148. 
149.             e.ip = index[i].lengths->elts;

src/http/modules/ngx_http_index_module.c:215:13: Call
213.         of.events = clcf->open_file_cache_events;
214. 
215.         if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
                 ^
216.             != NGX_OK)
217.         {

src/core/ngx_open_file_cache.c:126:1: <LHS trace>
124. 
125. 
126. ngx_int_t
     ^
127. ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name,
128.     ngx_open_file_info_t *of, ngx_pool_t *pool)

src/core/ngx_open_file_cache.c:126:1: Parameter `cache->current`
  124. 
  125. 
  126. ngx_int_t
       ^
  127. ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name,
  128.     ngx_open_file_info_t *of, ngx_pool_t *pool)

src/core/ngx_open_file_cache.c:297:9: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_open_cached_file` 
  295.         ngx_rbtree_delete(&cache->rbtree, &file->node);
  296. 
  297.         cache->current--;
               ^
  298. 
  299.         file->close = 1;
