#include <stdlib.h>

int ssl_init_server_certs()
{
#ifdef HAVE_ECC
  int *eckey;
#endif

#ifdef HAVE_ECC
  eckey = malloc(sizeof(int));
  if (rand() % 2) {
    *eckey = 30;
  } else {
#if defined(SSL_CTX_set_ecdh_auto)
  // do something
#else
  *eckey = 15;
#endif
  }
#endif

  // code making use of 'eckey'
  // return having forgotten to free the memory
  return 0;
}

int ssl_init_server_ctx()
{
  return ssl_init_server_certs();
}

int ssl_init_ConfigureServer()
{
  return ssl_init_server_ctx();
}

int ssl_init_Module()
{
  return ssl_init_ConfigureServer();
}

int main(void)
{
  ssl_init_Module();
  return 0;
}

. call modules/ssl/ssl_engine_init.c:141:ssl_init_Module()
. 310: ssl_init_ConfigureServer()
.. call modules/ssl/ssl_engine_init.c:1492:ssl_init_ConfigureServer()
.. 1505: ssl_init_server_ctx()
... call modules/ssl/ssl_engine_init.c:1383:ssl_init_server_ctx()
... 1410: ssl_init_server_certs()
... call modules/ssl/ssl_engine_init.c:971:ssl_init_server_certs()
... 1141: SSL_CTX_set_tmp_ecdh(mctx->ssl_ctx, eckey);
... ERROR 1150: return APR_SUCCESS;