Error when `yaml_stream = True,` about rules_jsonnet HOT 10 CLOSED

$ bazel build //prow/cluster/monitoring/mixins/prometheus:prow_prometheusrule
DEBUG: /home/hongkliu/.cache/bazel/_bazel_hongkliu/ef5e8e918e6947b01dd429bce37b0e43/external/bazel_toolchains/rules/rbe_repo/checked_in.bzl:256:5: rbe_default is using checked-in configs 'struct(config_repos = [], create_cc_configs = True, create_java_configs = True, env = {"ABI_LIBC_VERSION": "glibc_2.19", "ABI_VERSION": "clang", "BAZEL_COMPILER": "clang", "BAZEL_HOST_SYSTEM": "i686-unknown-linux-gnu", "BAZEL_TARGET_CPU": "k8", "BAZEL_TARGET_LIBC": "glibc_2.19", "BAZEL_TARGET_SYSTEM": "x86_64-unknown-linux-gnu", "CC": "clang", "CC_TOOLCHAIN_NAME": "linux_gnu_x86"}, java_home = "/usr/lib/jvm/java-8-openjdk-amd64", name = "9.0.0")'
INFO: Analyzed target //prow/cluster/monitoring/mixins/prometheus:prow_prometheusrule (29 packages loaded, 230 targets configured).
INFO: Found 1 target...
Target //prow/cluster/monitoring/mixins/prometheus:prow_prometheusrule up-to-date:
  bazel-bin/prow/cluster/monitoring/mixins/prometheus/prow_prometheusrule.yaml
INFO: Elapsed time: 28.199s, Critical Path: 26.65s
INFO: 15 processes: 15 linux-sandbox.
INFO: Build completed successfully, 19 total actions

$ cat bazel-bin/prow/cluster/monitoring/mixins/prometheus/prow_prometheusrule.yaml
---
{
   "apiVersion": "monitoring.coreos.com/v1",
   "kind": "PrometheusRule",
   "metadata": {
      "labels": {
         "prometheus": "prow",
         "role": "alert-rules"
      },
      "name": "prometheus-prow-rules",
      "namespace": "prow-monitoring"
   },
   "spec": {
      "groups": [
         {
            "name": "ci-absent",
            "rules": [
               {
                  "alert": "deckDown",
                  "annotations": {
                     "message": "The service deck has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"deck\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "ghproxyDown",
                  "annotations": {
                     "message": "The service ghproxy has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"ghproxy\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "hookDown",
                  "annotations": {
                     "message": "The service hook has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"hook\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "plankDown",
                  "annotations": {
                     "message": "The service plank has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"plank\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "sinkerDown",
                  "annotations": {
                     "message": "The service sinker has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"sinker\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "tideDown",
                  "annotations": {
                     "message": "The service tide has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"tide\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               }
            ]
         },
         {
            "name": "prow-monitoring-absent",
            "rules": [
               {
                  "alert": "ServiceLostHA",
                  "annotations": {
                     "message": "The service {{ $labels.job }} has at most 1 instance for 5 minutes."
                  },
                  "expr": "sum(up{job=~\"grafana|prometheus|alertmanager\"}) by (job) <= 1\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "alertmanagerDown",
                  "annotations": {
                     "message": "The service alertmanager has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"alertmanager\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               },
               {
                  "alert": "prometheusDown",
                  "annotations": {
                     "message": "The service prometheus has been down for 5 minutes."
                  },
                  "expr": "absent(up{job=\"prometheus\"} == 1)\n",
                  "for": "5m",
                  "labels": {
                     "severity": "slack"
                  }
               }
            ]
         }
      ]
   }
}
...