src/http/modules/ngx_http_limit_conn_module.c:367: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned16.

src/http/modules/ngx_http_limit_conn_module.c:362:5: <LHS trace>
360.     lc = (ngx_http_limit_conn_node_t *) &node->color;
361. 
362.     ngx_shmtx_lock(&shpool->mutex);
         ^
363. 
364.     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0,

src/http/modules/ngx_http_limit_conn_module.c:362:5: Call
360.     lc = (ngx_http_limit_conn_node_t *) &node->color;
361. 
362.     ngx_shmtx_lock(&shpool->mutex);
         ^
363. 
364.     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0,

src/core/ngx_shmtx.c:68:1: Parameter `mtx->spin`
  66. 
  67. 
  68. void
      ^
  69. ngx_shmtx_lock(ngx_shmtx_t *mtx)
  70. {

src/http/modules/ngx_http_limit_conn_module.c:367:5: Binary operation: ([0, +oo] - 1):unsigned16
365.                    "limit zone cleanup: %08XD %d", node->key, lc->conn);
366. 
367.     lc->conn--;
         ^
368. 
369.     if (lc->conn == 0) {
