Fix for issue 12417 (#12420)

Closes #12417
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src/Bicep.Core.IntegrationTests/ScenarioTests.cs

@@ -5298,4 +5298,71 @@ public void Test_Issue11981()
  ("BCP037", DiagnosticLevel.Error, "The property \"baz\" is not allowed on objects of type \"{ bar: string }\". No other properties are allowed."),
  });
  }
+
+ // https://github.com/Azure/bicep/issues/12417
+ [TestMethod]
+ public void Test_Issue12417()
+ {
+ var result = CompilationHelper.CompileParams(
+("parameters.bicepparam", @"
+using 'test.bicep'
+
+param azureEnvironments
+
+param region = azureEnvironments.AzureCloud.eventHubName.dev
+"),
+("test.bicep", @"
+@description('Azure environment specific configuration settings')
+type AzureEnvironmentType = {
+ @description('Azure US Government specific settings')
+ AzureUSGovernment: {
+ @description('Azure Gov Event Hub ResourceIds')
+ eventHubName: {
+ prod: 'resourceId'
+ qa: 'resourceId'
+ dev: 'resourceId'
+ }
+ @description('Azure Gov supported regions')
+ region: {
+ usgovvirginia: 'ugv'
+ usgovtexas: 'ugt'
+ }
+ @description('Azure Gov Log Analytics ResourceIds')
+ workspace: {
+ prod: 'resourceId'
+ qa: 'resourceId'
+ dev: 'resourceId'
+ }
+ }
+ @description('Azure Global specific settings')
+ AzureCloud: {
+ @description('Azure Global Event Hub ResourceIds')
+ eventHubName: {
+ prod: 'resourceId'
+ qa: 'resourceId'
+ dev: 'resourceId'
+ }
+ @description('Azure Global supported regions')
+ region: {
+ eastus: 'eus'
+ westus: 'wus'
+ }
+ @description('Azure Global Log Analytics ResourceIds')
+ workspace: {
+ prod: 'resourceId'
+ qa: 'resourceId'
+ dev: 'resourceId'
+ }
+ }
+}
+
+param azureEnvironments AzureEnvironmentType
+"));
+
+ result.Should().HaveDiagnostics(new[] {
+ ("BCP018", DiagnosticLevel.Error, "Expected the \"=\" character at this location."),
+ ("BCP259", DiagnosticLevel.Error, "The parameter \"region\" is assigned in the params file without being declared in the Bicep file."),
+ ("BCP062", DiagnosticLevel.Error, "The referenced declaration with name \"azureEnvironments\" is not valid."),
+ });
+ }
 }

src/Bicep.Core/Emit/EmitLimitationCalculator.cs

@@ -518,8 +518,7 @@ private static void BlockCyclicAggregateTypeReferences(SemanticModel model, IDia
  {
  referencedValueHasError = true;
  }
-
- if (referenced.Key is ParameterAssignmentSymbol parameterAssignment)
+ else if (referenced.Key is ParameterAssignmentSymbol parameterAssignment)
  {
  if (generated[parameterAssignment].KeyVaultReferenceExpression is not null)
  {