Sam local invoke (go) not honoring timeout in context

Description:

When running a golang lambda function with sam local invoke, and making a request (in the function) using the context results in RequestCanceled: request context canceled caused by: context deadline exceeded.

When using ListBuckets (without WithContext) results in a successful result.

Steps to reproduce:

hello.go

type Response events.APIGatewayProxyResponse

func Handler(ctx context.Context) (Response, error) {
	fmt.Printf("%+v\n", ctx)
	var buf bytes.Buffer

	sess := session.Must(session.NewSession(&aws.Config{Region: aws.String("us-west-2")}))
	svc := s3.New(sess)

	// Using the WithContext version of ListBuckets makes it apparent that the context isn't set to honor the function timeout
	b, err := svc.ListBucketsWithContext(ctx, &s3.ListBucketsInput{})
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(b)

	body, err := json.Marshal(map[string]interface{}{
		"message": "Go Serverless v1.0! Your function executed successfully!",
	})
	if err != nil {
		return Response{StatusCode: 404}, err
	}
	json.HTMLEscape(&buf, body)

	resp := Response{
		StatusCode:      200,
		IsBase64Encoded: false,
		Body:            buf.String(),
		Headers: map[string]string{
			"Content-Type":           "application/json",
			"X-MyCompany-Func-Reply": "hello-handler",
		},
	}

	return resp, nil
}

func main() {
	lambda.Start(Handler)
}

template.yml

AWSTemplateFormatVersion: "2010-09-09"
Transform: "AWS::Serverless-2016-10-31"
Description: "Demo SAM Template"
Resources:
  Demo:
    Type: "AWS::Serverless::Function"
    Properties:
      Handler: bin/hello
      Runtime: go1.x
      MemorySize: 128
      Timeout: 30
      Environment:
        Variables:
          AWS_ACCESS_KEY_ID: myaccesskey
          AWS_SECRET_ACCESS_KEY: mysecretkey
          AWS_SESSION_TOKEN: mytoken
      Policies:
        - Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Action:
                - "s3:*"
              Resource: "*"

Observed result:

RequestCanceled: request context canceled caused by: context deadline exceeded

Expected result:

{
  Buckets: [
    {
      CreationDate: 2020-04-21 00:00:00 +0000 UTC,
      Name: "bucket-names"
    }
  ],
  Owner: {
    DisplayName: "...",
    ID: "..."
  }
}

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: macOS 10.15.7
2. sam --version: SAM CLI, version 1.15.

Add --debug flag to command you are running

[mousedownmike]

I rolled back to SAM CLI, version 1.12.0 to get this working again.

[mnugter]

I’m experiencing this issue as well while it was working earlier on when I had v1.15. I’ve tried upgrading to v1.18.1 but that didn’t help. I have the exact same problem as @momotaro98 described.