force a check for go 1.21, speed up validate as it does not need tests

Author: Groxx

.buildkite/pipeline.yml

@@ -70,9 +70,19 @@ steps:
                 command:
                 - |-
                   ./scripts/golint.sh
-      - docker-compose#v3.0.0:
-          run: unit-test
-          config: docker/buildkite/docker-compose.yml
+
+  - label: ":golang: ensure it builds on go 1.21"
+    artifact_paths: [ ]
+    plugins:
+      - kubernetes:
+          <<: *kubernetes
+          podSpec:
+            <<: *podSpec
+            containers:
+              - <<: *commandContainer
+                command:
+                  - |-
+                    GOTOOLCHAIN=go1.21.1 go build ./...
 
   - label: ":golang: integration-test-sticky-off"
     artifact_paths:

workflow/workflow.go

@@ -21,13 +21,26 @@
 package workflow
 
 import (
+	"fmt"
+
 	"github.com/uber-go/tally"
 	"go.uber.org/zap"
 
 	"go.uber.org/cadence/encoded"
 	"go.uber.org/cadence/internal"
+
+	"testing"
+	"weak"
 )
 
+func init() {
+	var s string
+	sp := weak.Make(&s)
+	fmt.Println(sp)
+
+	_ = (&testing.T{}).Context()
+}
+
 type (
 
 	// ChildWorkflowFuture represents the result of a child workflow execution