using none statement in bicepparam file crashes the Bicep CLI with a Python Exception #18220
Description
Bicep version
Bicep CLI version 0.38.33 (6bb5d5f)
"azure-cli": "2.77.0",
Describe the bug
A bicepparam with a using none statement crashes out with a Python exception. This using none should allow me to share the bicepparam file with different deployments, but it doesn't seem to work at all.
To Reproduce
This very simple bicepparam works properly
using 'main.bicep'
param environment = 'dev'
with the following simple main.bicep
param environment string
output env string = environment
Running this command az deployment group create -g test -f main.bicep --parameters main.dev.bicepparam.
But changing from using 'main.bicep' to using none and re-running the command results in a python exception
expected string or bytes-like object, got 'NoneType'
Additional context
Debug output
cli.knack.cli: Command arguments: ['deployment', 'group', 'create', '-g', 'hades', '-f', 'main.bicep', '--parameters', 'main.dev.bicepparam', '--debug']
cli.knack.cli: __init__ debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [<function CLILogging.on_global_arguments at 0x7ff287fb8fe0>, <function OutputProducer.on_global_arguments at 0x7ff287d30cc0>, <function CLIQuery.on_global_arguments at 0x7ff287d5ade0>]
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
cli.azure.cli.core: Modules found from index for 'deployment': ['azure.cli.command_modules.resource']
cli.azure.cli.core: Loading command modules:
cli.azure.cli.core: Name Load Time Groups Commands
cli.azure.cli.core: resource 0.130 52 234
cli.azure.cli.core: Total (1) 0.130 52 234
cli.azure.cli.core: These extensions are not installed and will be skipped: ['azext_ai_examples', 'azext_next']
cli.azure.cli.core: Loading extensions:
cli.azure.cli.core: Name Load Time Groups Commands Directory
cli.azure.cli.core: Total (0) 0.000 0 0
cli.azure.cli.core: Loaded 52 groups, 234 commands.
cli.azure.cli.core: Found a match in the command table.
cli.azure.cli.core: Raw command : deployment group create
cli.azure.cli.core: Command table: deployment group create
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate [<function AzCliLogging.init_command_file_logging at 0x7ff286fc22a0>]
cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to '/root/.azure/commands/2025-10-09.12-44-39.deployment_group_create.5292.log'.
az_command_data_logger: command args: deployment group create -g {} -f {} --parameters {} --debug
cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [<function register_global_subscription_argument.<locals>.add_subscription_parameter at 0x7ff286ff7560>]
cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
cli.knack.cli: Event: CommandInvoker.OnPostCommandTableCreate [<function register_ids_argument.<locals>.add_ids_arguments at 0x7ff28701d8a0>, <function register_cache_arguments.<locals>.add_cache_arguments at 0x7ff28701da80>, <function register_upcoming_breaking_change_info.<locals>.update_breaking_change_info at 0x7ff28701db20>]
cli.knack.cli: Event: CommandInvoker.OnCommandTableLoaded []
cli.knack.cli: Event: CommandInvoker.OnPreParseArgs []
cli.knack.cli: Event: CommandInvoker.OnPostParseArgs [<function OutputProducer.handle_output_argument at 0x7ff287d30d60>, <function CLIQuery.handle_query_parameter at 0x7ff287d5ae80>, <function register_ids_argument.<locals>.parse_ids_arguments at 0x7ff28701d940>]
cli.azure.cli.command_modules.resource._bicep: Current value of "use_binary_from_path": false.
cli.azure.cli.command_modules.resource._bicep: Current value of "use_binary_from_path": false.
cli.azure.cli.command_modules.resource._bicep: Current value of "use_binary_from_path": false.
cli.azure.cli.command_modules.resource._bicep: Bicep CLI installation path: /root/.azure/bin/bicep
cli.azure.cli.command_modules.resource._bicep: Bicep CLI installed: True.
urllib3.connectionpool: Starting new HTTPS connection (1): aka.ms:443
urllib3.connectionpool: https://aka.ms:443 "GET /BicepLatestRelease HTTP/1.1" 301 0
urllib3.connectionpool: Starting new HTTPS connection (1): downloads.bicep.azure.com:443
urllib3.connectionpool: https://downloads.bicep.azure.com:443 "GET /releases/latest HTTP/1.1" 200 54486
cli.azure.cli.core.azclierror: Traceback (most recent call last):
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 703, in _run_job
result = cmd_copy(params)
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 336, in __call__
return self.handler(*args, **kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
return op(**command_args)
File "/opt/az/lib/python3.13/site-packages/azure/cli/command_modules/resource/custom.py", line 603, in deploy_arm_template_at_resource_group
return _deploy_arm_template_at_resource_group(cmd=cmd,
resource_group_name=resource_group_name,
...<4 lines>...
no_prompt=no_prompt, template_spec=template_spec, query_string=query_string,
validation_level=validation_level)
File "/opt/az/lib/python3.13/site-packages/azure/cli/command_modules/resource/custom.py", line 636, in _deploy_arm_template_at_resource_group
deployment_properties = _prepare_deployment_properties_unmodified(cmd, 'resourceGroup', template_file=template_file,
template_uri=template_uri,
...<2 lines>...
no_prompt=no_prompt, template_spec=template_spec,
query_string=query_string, validation_level=validation_level)
File "/opt/az/lib/python3.13/site-packages/azure/cli/command_modules/resource/custom.py", line 1162, in _prepare_deployment_properties_unmodified
template_obj = _remove_comments_from_json(template_content)
File "/opt/az/lib/python3.13/site-packages/azure/cli/command_modules/resource/custom.py", line 359, in _remove_comments_from_json
template = re.sub(r'(^[\t ]*//[\s\S]*?\n)|(^[\t ]*/\*{1,2}[\s\S]*?\*/)', '', template, flags=re.M)
File "/opt/az/lib/python3.13/re/__init__.py", line 208, in sub
return _compile(pattern, flags).sub(repl, string, count)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
TypeError: expected string or bytes-like object, got 'NoneType'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/arm.py", line 109, in handle_template_based_exception
raise CLIError(ex.inner_exception.error.message)
^^^^^^^^^^^^^^^^^^
AttributeError: 'TypeError' object has no attribute 'inner_exception'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/az/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 666, in execute
raise ex
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 726, in _run_job
return cmd_copy.exception_handler(ex)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/arm.py", line 114, in handle_template_based_exception
raise CLIError(ex)
knack.util.CLIError: expected string or bytes-like object, got 'NoneType'
cli.azure.cli.core.azclierror: expected string or bytes-like object, got 'NoneType'
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