az functionapp list --output table fails when appServicePlanId is absent #33914

Summary

az functionapp list --output table fails when any Function App response omits appServicePlanId. JSON output succeeds.

Reproduction

az version
# azure-cli 2.89.1

az functionapp list --output table

Actual result

ERROR: Table output unavailable. Use the --query option to specify an appropriate query. Use --debug for more info.

The debug traceback identifies the underlying failure:

File "azure/cli/command_modules/appservice/commands.py", line 35, in transform_web_output
  result["appServicePlan"] = result.pop("appServicePlanId").split("/")[-1]
KeyError: 'appServicePlanId'

Expected result

az functionapp list --output table should render the Function Apps list without failing when appServicePlanId is missing. The formatter should tolerate an omitted optional field.

Workaround

Explicitly project fields before requesting table output:

az functionapp list --query '[].{Name:name,ResourceGroup:resourceGroup,Location:location,State:state}' --output table

Related issues

• az functionapp function keys list broken in 2.87.0 #33516: az functionapp function keys list broken in 2.87.0
• az functionapp list returns incorrect null values #16698: az functionapp list returns incorrect null values

This may be another regression in the Function App output/transform layer introduced around 2.87.0.