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Bug: sam validate - TypeError #7973

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#7983
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Bug: sam validate - TypeError#7973
#7983
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@emusiienko

Description

@emusiienko
emusiienko
opened on Apr 8, 2025

Description:

Sam crashed when I call "sam validate"

Steps to reproduce:

call sam validate -t template.yaml

using my template.yaml file

Observed result:

Utility crashes

Expected result:

Utility doesn't crash

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

  1. OS: Mac OS 14.5
  2. sam --version: 1.137.0
  3. AWS region: us-east-1
# Paste the output of `sam --info` here

Add --debug flag to command you are running

2025-04-08 20:00:37,424 | Config file location: /Users/Evgeniy/Work/Projects/Wallstreet_prep/samconfig.toml
2025-04-08 20:00:37,425 | Loading configuration values from [default.['validate'].parameters] (env.command_name.section) in config file at '/Users/Evgeniy/Work/Projects/Wallstreet_prep/samconfig.toml'...
2025-04-08 20:00:37,426 | Configuration values successfully loaded.
2025-04-08 20:00:37,426 | Configuration values are: {'stack_name': 'wallstreet-prep-chatbot', 'lint': True}
2025-04-08 20:00:37,446 | Using config file: samconfig.toml, config environment: default
2025-04-08 20:00:37,446 | Expand command line arguments to:
2025-04-08 20:00:37,446 | --template_file=/Users/Evgeniy/Work/Projects/Wallstreet_prep/template.yaml --lint
2025-04-08 20:00:37 Looking for CFLINTRC before attempting to load
2025-04-08 20:00:37 Validating User CFNLINTRC
2025-04-08 20:00:37 Validating CFNLINTRC config with given JSONSchema
2025-04-08 20:00:37 Schema used: {'$id': 'https://github.com/aws-cloudformation/cfn-python-lint/blob/main/src/cfnlint/data/CfnLintCli/config/schema.json', '$schema': 'http://json-schema.org/draft-07/schema#', 'additionalProperties': False, 'description': 'CFNLINTRC configuration schema', 'properties': {'append_rules': {'description': 'Location of directories to append rules from', 'items': {'type': 'string'}, 'type': 'array'}, 'configure_rules': {'additionalProperties': False, 'description': 'Configure rules', 'patternProperties': {'^.$': {'patternProperties': {'^.$': {'anyOf': [{'type': 'string'}, {'type': 'integer'}, {'type': 'boolean'}, {'items': {'type': 'string'}, 'type': 'array'}, {'items': {'type': 'integer'}, 'type': 'array'}, {'items': {'type': 'string'}, 'type': 'boolean'}]}}, 'type': 'object'}}, 'type': 'object'}, 'custom_rules': {'description': 'custom rule file to use', 'type': 'string'}, 'debug': {'description': 'Debug mode', 'type': 'boolean'}, 'ignore_bad_template': {'description': 'Ignore bad templates', 'type': 'boolean'}, 'ignore_checks': {'description': 'List of checks to ignore', 'items': {'type': 'string'}, 'type': 'array'}, 'ignore_templates': {'description': 'Templates to ignore', 'items': {'type': 'string'}, 'type': 'array'}, 'include_checks': {'description': 'List of checks to include', 'items': {'type': 'string'}, 'type': 'array'}, 'mandatory_checks': {'description': 'List of mandatory checks to enforce', 'items': {'type': 'string'}, 'type': 'array'}, 'merge_configs': {'description': 'Merges lists between configuration layers', 'type': 'boolean'}, 'output_file': {'description': 'Path to the file to write the main output to', 'type': 'string'}, 'override_spec': {'description': 'Path to spec file to override with', 'type': 'string'}, 'regions': {'description': 'Regions to test against', 'items': {'type': 'string'}, 'type': 'array'}, 'registry_schemas': {'description': 'One or more directories of CloudFormation Registry Resource Schemas', 'items': {'type': 'string'}, 'type': 'array'}, 'templates': {'description': 'Templates to lint', 'items': {'type': 'string'}, 'type': 'array'}}, 'title': 'CFNLINTRC JSON Schema', 'type': 'object'}
2025-04-08 20:00:37 Config used: {}
2025-04-08 20:00:37 CFNLINTRC looks valid!
2025-04-08 20:00:37 Validating Project CFNLINTRC
2025-04-08 20:00:37 Validating CFNLINTRC config with given JSONSchema
2025-04-08 20:00:37 Schema used: {'$id': 'https://github.com/aws-cloudformation/cfn-python-lint/blob/main/src/cfnlint/data/CfnLintCli/config/schema.json', '$schema': 'http://json-schema.org/draft-07/schema#', 'additionalProperties': False, 'description': 'CFNLINTRC configuration schema', 'properties': {'append_rules': {'description': 'Location of directories to append rules from', 'items': {'type': 'string'}, 'type': 'array'}, 'configure_rules': {'additionalProperties': False, 'description': 'Configure rules', 'patternProperties': {'^.$': {'patternProperties': {'^.$': {'anyOf': [{'type': 'string'}, {'type': 'integer'}, {'type': 'boolean'}, {'items': {'type': 'string'}, 'type': 'array'}, {'items': {'type': 'integer'}, 'type': 'array'}, {'items': {'type': 'string'}, 'type': 'boolean'}]}}, 'type': 'object'}}, 'type': 'object'}, 'custom_rules': {'description': 'custom rule file to use', 'type': 'string'}, 'debug': {'description': 'Debug mode', 'type': 'boolean'}, 'ignore_bad_template': {'description': 'Ignore bad templates', 'type': 'boolean'}, 'ignore_checks': {'description': 'List of checks to ignore', 'items': {'type': 'string'}, 'type': 'array'}, 'ignore_templates': {'description': 'Templates to ignore', 'items': {'type': 'string'}, 'type': 'array'}, 'include_checks': {'description': 'List of checks to include', 'items': {'type': 'string'}, 'type': 'array'}, 'mandatory_checks': {'description': 'List of mandatory checks to enforce', 'items': {'type': 'string'}, 'type': 'array'}, 'merge_configs': {'description': 'Merges lists between configuration layers', 'type': 'boolean'}, 'output_file': {'description': 'Path to the file to write the main output to', 'type': 'string'}, 'override_spec': {'description': 'Path to spec file to override with', 'type': 'string'}, 'regions': {'description': 'Regions to test against', 'items': {'type': 'string'}, 'type': 'array'}, 'registry_schemas': {'description': 'One or more directories of CloudFormation Registry Resource Schemas', 'items': {'type': 'string'}, 'type': 'array'}, 'templates': {'description': 'Templates to lint', 'items': {'type': 'string'}, 'type': 'array'}}, 'title': 'CFNLINTRC JSON Schema', 'type': 'object'}
2025-04-08 20:00:37 Config used: {}
2025-04-08 20:00:37 CFNLINTRC looks valid!
2025-04-08 20:00:37 User configuration loaded as
2025-04-08 20:00:37 {}
2025-04-08 20:00:37 Project configuration loaded as
2025-04-08 20:00:37 {}
2025-04-08 20:00:37 Merging configurations...
2025-04-08 20:00:37 Run scan of template None
2025-04-08 20:00:37 SAM Translator: 1.96.0
2025-04-08 20:00:37 Setting AWS_DEFAULT_REGION to us-east-1
2025-04-08 20:00:37 Transformed template from AWS::Serverless-2016-10-31:
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "wallstreet-prep-chatbot\nSample SAM Template for wallstreet-prep-chatbot\n",
"Outputs": {
"HelloWorldApi": {
"Description": "API Gateway endpoint URL for Prod stage for Hello World function",
"Value": "test"
}
},
"Parameters": {
"ArchitectureParameter": {
"AllowedValues": [
"x86_64",
"arm64"
],
"Default": "x86_64",
"Description": "Enter lambda architecture",
"Type": "String"
},
"AssistantId": {
"Default": "",
"Description": "The Assistant Id",
"NoEcho": true,
"Type": "String"
},
"MaxHistoryLength": {
"Default": "",
"Type": "String"
},
"MessageSimilarityThreshold": {
"Default": "",
"Type": "String"
},
"MinHistoryLength": {
"Default": "",
"Type": "String"
},
"OpenAIAPIKey": {
"Default": "",
"Description": "The OpenAI key",
"NoEcho": true,
"Type": "String"
},
"OpenSearchRedundancy": {
"Default": "ENABLED",
"Description": "Defines if opensearch collection has deployed to 2 AZ's for high availability. High availability also means *2 cost",
"Type": "String"
},
"RelatedContentSimilarityScoreThreshold": {
"Default": "",
"Type": "String"
},
"UseAssistantBasedResponses": {
"Default": "false",
"Type": "String"
}
},
"Resources": {
"ApplicationInsightsMonitoring": {
"Properties": {
"AutoConfigurationEnabled": "true",
"ResourceGroupName": {
"Ref": "ApplicationResourceGroup"
}
},
"Type": "AWS::ApplicationInsights::Application"
},
"ApplicationResourceGroup": {
"Properties": {
"Name": {
"Fn::Sub": "ApplicationInsights-SAM-${AWS::StackName}"
},
"ResourceQuery": {
"Type": "CLOUDFORMATION_STACK_1_0"
}
},
"Type": "AWS::ResourceGroups::Group"
},
"Assistant": {
"Properties": {
"Location": "./.aws/assistant.yaml",
"Parameters": {
"ArchitectureParameter": {
"Ref": "ArchitectureParameter"
},
"AssistantId": {
"Ref": "AssistantId"
},
"MaxHistoryLength": {
"Ref": "MaxHistoryLength"
},
"MessageSimilarityThreshold": {
"Ref": "MessageSimilarityThreshold"
},
"MinHistoryLength": {
"Ref": "MinHistoryLength"
},
"OpenAIAPIKey": {
"Ref": "OpenAIAPIKey"
},
"OpensearchCollectionUrl": {
"Fn::GetAtt": [
"OpenSearchCollection",
"Outputs.OpenSearchCollectionEndpointUrl"
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"RelatedContentSimilarityScoreThreshold": {
"Ref": "RelatedContentSimilarityScoreThreshold"
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
},
"UseAssistantBasedResponses": {
"Ref": "UseAssistantBasedResponses"
}
},
"TemplateUrl": "./.aws/assistant.yaml"
},
"Type": "AWS::Serverless::Application"
},
"CloudWatch": {
"Properties": {
"Location": "./.aws/cloudwatch.yaml",
"Parameters": {
"Lambdas": {
"Fn::GetAtt": [
"Assistant",
"Outputs.Lambdas"
]
}
},
"TemplateUrl": "./.aws/cloudwatch.yaml"
},
"Type": "AWS::Serverless::Application"
},
"Glue": {
"Properties": {
"Location": "./.aws/glue.yaml",
"Parameters": {
"ConnectionAvailabilityZone": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetAZ"
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
}
},
"TemplateUrl": "./.aws/glue.yaml"
},
"Type": "AWS::Serverless::Application"
},
"IAM": {
"Properties": {
"Location": "./.aws/iam.yaml",
"TemplateUrl": "./.aws/iam.yaml"
},
"Type": "AWS::Serverless::Application"
},
"Network": {
"Properties": {
"Location": "./.aws/network.yaml",
"TemplateUrl": "./.aws/network.yaml"
},
"Type": "AWS::Serverless::Application"
},
"OpenSearchCollection": {
"Properties": {
"Location": "./.aws/opensearch.yaml",
"Parameters": {
"OpenSearchRedundancy": {
"Ref": "OpenSearchRedundancy"
},
"PrincipalsIAMRoleArns": {
"Fn::Join": [
",",
[
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentManagerLambdaRoleArn"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentSearchLambdaRoleArn"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.AWSGlueServiceRoleArn"
]
}
]
]
},
"PrincipalsIAMRoleNames": {
"Fn::Join": [
",",
[
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentManagerLambdaRoleName"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentSearchLambdaRoleName"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.AWSGlueServiceRoleName"
]
}
]
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
},
"VpcId": {
"Fn::GetAtt": [
"Network",
"Outputs.VPCId"
]
}
},
"TemplateUrl": "./.aws/opensearch.yaml"
},
"Type": "AWS::Serverless::Application"
}
},
"Transform": "AWS::Serverless-2016-10-31"
}
2025-04-08 20:00:37 Transformed template:
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "wallstreet-prep-chatbot\nSample SAM Template for wallstreet-prep-chatbot\n",
"Outputs": {
"HelloWorldApi": {
"Description": "API Gateway endpoint URL for Prod stage for Hello World function",
"Value": "test"
}
},
"Parameters": {
"ArchitectureParameter": {
"AllowedValues": [
"x86_64",
"arm64"
],
"Default": "x86_64",
"Description": "Enter lambda architecture",
"Type": "String"
},
"AssistantId": {
"Default": "",
"Description": "The Assistant Id",
"NoEcho": true,
"Type": "String"
},
"MaxHistoryLength": {
"Default": "",
"Type": "String"
},
"MessageSimilarityThreshold": {
"Default": "",
"Type": "String"
},
"MinHistoryLength": {
"Default": "",
"Type": "String"
},
"OpenAIAPIKey": {
"Default": "",
"Description": "The OpenAI key",
"NoEcho": true,
"Type": "String"
},
"OpenSearchRedundancy": {
"Default": "ENABLED",
"Description": "Defines if opensearch collection has deployed to 2 AZ's for high availability. High availability also means *2 cost",
"Type": "String"
},
"RelatedContentSimilarityScoreThreshold": {
"Default": "",
"Type": "String"
},
"UseAssistantBasedResponses": {
"Default": "false",
"Type": "String"
}
},
"Resources": {
"ApplicationInsightsMonitoring": {
"Properties": {
"AutoConfigurationEnabled": "true",
"ResourceGroupName": {
"Ref": "ApplicationResourceGroup"
}
},
"Type": "AWS::ApplicationInsights::Application"
},
"ApplicationResourceGroup": {
"Properties": {
"Name": {
"Fn::Sub": "ApplicationInsights-SAM-${AWS::StackName}"
},
"ResourceQuery": {
"Type": "CLOUDFORMATION_STACK_1_0"
}
},
"Type": "AWS::ResourceGroups::Group"
},
"Assistant": {
"Properties": {
"Parameters": {
"ArchitectureParameter": {
"Ref": "ArchitectureParameter"
},
"AssistantId": {
"Ref": "AssistantId"
},
"MaxHistoryLength": {
"Ref": "MaxHistoryLength"
},
"MessageSimilarityThreshold": {
"Ref": "MessageSimilarityThreshold"
},
"MinHistoryLength": {
"Ref": "MinHistoryLength"
},
"OpenAIAPIKey": {
"Ref": "OpenAIAPIKey"
},
"OpensearchCollectionUrl": {
"Fn::GetAtt": [
"OpenSearchCollection",
"Outputs.OpenSearchCollectionEndpointUrl"
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"RelatedContentSimilarityScoreThreshold": {
"Ref": "RelatedContentSimilarityScoreThreshold"
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
},
"UseAssistantBasedResponses": {
"Ref": "UseAssistantBasedResponses"
}
},
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/assistant.yaml"
},
"Type": "AWS::CloudFormation::Stack"
},
"CloudWatch": {
"Properties": {
"Parameters": {
"Lambdas": {
"Fn::GetAtt": [
"Assistant",
"Outputs.Lambdas"
]
}
},
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/cloudwatch.yaml"
},
"Type": "AWS::CloudFormation::Stack"
},
"Glue": {
"Properties": {
"Parameters": {
"ConnectionAvailabilityZone": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetAZ"
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
}
},
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/glue.yaml"
},
"Type": "AWS::CloudFormation::Stack"
},
"IAM": {
"Properties": {
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/iam.yaml"
},
"Type": "AWS::CloudFormation::Stack"
},
"Network": {
"Properties": {
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/network.yaml"
},
"Type": "AWS::CloudFormation::Stack"
},
"OpenSearchCollection": {
"Properties": {
"Parameters": {
"OpenSearchRedundancy": {
"Ref": "OpenSearchRedundancy"
},
"PrincipalsIAMRoleArns": {
"Fn::Join": [
",",
[
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentManagerLambdaRoleArn"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentSearchLambdaRoleArn"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.AWSGlueServiceRoleArn"
]
}
]
]
},
"PrincipalsIAMRoleNames": {
"Fn::Join": [
",",
[
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentManagerLambdaRoleName"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.ContentSearchLambdaRoleName"
]
},
{
"Fn::GetAtt": [
"IAM",
"Outputs.AWSGlueServiceRoleName"
]
}
]
]
},
"PrivateSubnetId": {
"Fn::GetAtt": [
"Network",
"Outputs.PrivateSubnetId"
]
},
"SecurityGroup": {
"Fn::GetAtt": [
"Network",
"Outputs.SecurityGroupId"
]
},
"VpcId": {
"Fn::GetAtt": [
"Network",
"Outputs.VPCId"
]
}
},
"Tags": [
{
"Key": "lambda:createdBy",
"Value": "SAM"
}
],
"TemplateURL": "./.aws/opensearch.yaml"
},
"Type": "AWS::CloudFormation::Stack"
}
}
}
2025-04-08 20:00:37,989 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
2025-04-08 20:00:37,990 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
2025-04-08 20:00:37,990 | Unable to find Click Context for getting session_id.

Error: expected str, bytes or os.PathLike object, not NoneType
Traceback:
File "click/core.py", line 1078, in main
File "click/core.py", line 1688, in invoke
File "click/core.py", line 1434, in invoke
File "click/core.py", line 783, in invoke
File "samcli/cli/cli_config_file.py", line 347, in wrapper
File "click/decorators.py", line 92, in new_func
File "click/core.py", line 783, in invoke
File "samcli/lib/telemetry/metric.py", line 185, in wrapped
File "samcli/lib/telemetry/metric.py", line 150, in wrapped
File "samcli/lib/utils/version_checker.py", line 43, in wrapped
File "samcli/cli/main.py", line 95, in wrapper
File "samcli/commands/_utils/cdk_support_decorators.py", line 40, in wrapped
File "samcli/commands/_utils/command_exception_handler.py", line 89, in wrapper_command_exception_handler
File "samcli/commands/_utils/command_exception_handler.py", line 69, in wrapper_command_exception_handler
File "samcli/commands/validate/validate.py", line 70, in cli
File "samcli/commands/validate/validate.py", line 87, in do_cli
File "samcli/commands/validate/validate.py", line 176, in _lint
File "cfnlint/api.py", line 63, in lint
return list(runner.validate_template(None, template))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "cfnlint/runner.py", line 331, in validate_template
yield from runner.run()
File "cfnlint/runner.py", line 143, in run
matches = self.cfn.transform()
^^^^^^^^^^^^^^^^^^^^
File "cfnlint/template/template.py", line 118, in transform
results = transform.transform(self)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "cfnlint/template/transforms/transform.py", line 75, in transform
cfn.context = create_context_for_template(cfn)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "cfnlint/context/context.py", line 513, in create_context_for_template
resources = _init_resources(cfn.template.get("Resources", {}), cfn.filename)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "cfnlint/context/context.py", line 492, in _init_resources
obj[k] = Resource(v, filename)
^^^^^^^^^^^^^^^^^^^^^
File "", line 3, in init
File "cfnlint/context/context.py", line 456, in post_init
self._nested_stack_get_atts = _nested_stack_get_atts(
^^^^^^^^^^^^^^^^^^^^^^^
File "cfnlint/context/context.py", line 401, in _nested_stack_get_atts
base_dir = os.path.dirname(os.path.abspath(filename))
^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 399, in abspath

An unexpected error was encountered while executing "sam validate".
Search for an existing issue:
https://github.com/aws/aws-sam-cli/issues?q=is%3Aissue+is%3Aopen+Bug%3A%20sam%20validate%20-%20TypeError
Or create a bug report:
https://github.com/aws/aws-sam-cli/issues/new?template=Bug_report.md&title=Bug%3A%20sam%20validate%20-%20TypeError

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