ossl_x509stctx_get_err_string  323 ext/openssl/ossl_x509store.c static VALUE ossl_x509stctx_get_err_string(VALUE);
ossl_x509stctx_get_err_string  340 ext/openssl/ossl_x509store.c     rb_iv_set(self, "@error_string", ossl_x509stctx_get_err_string(ctx));
ossl_x509stctx_get_err_string  683 ext/openssl/ossl_x509store.c     rb_define_method(x509stctx,"error_string",ossl_x509stctx_get_err_string,0);