[Bug]: Error: The terraform-provider-aws_v4.61.0_x5 plugin crashed! interface conversion: interface {} is string, not []interface {}

[bendotexe]

Terraform Core Version

1.4.1

AWS Provider Version

4.61

Affected Resource(s)

aws_rds_cluster
aws_lambda_function

Though it seems to be an issue regardless of what's being changed.

Expected Behavior

Lambda should have updated in place with a new image.
Aurora should have updated it's master secret.

Actual Behavior

Terraform failure in CI/CD pipeline:

│ Error: Plugin did not respond
│
│ with aws_rds_cluster.this,
│ on 30-database.tf line 1, in resource "aws_rds_cluster" "this":
│ 1: resource "aws_rds_cluster" "this" {
│
│ The plugin encountered an error, and failed to respond to the
│ plugin.(*GRPCProvider).ApplyResourceChange call. The plugin logs may
│ contain more details.
╵
╷
│ Error: Plugin did not respond
│
│ with aws_lambda_function.data_retrieval,
│ on 50-service-data-fetcher.tf line 116, in resource "aws_lambda_function" "data_retrieval":
│ 116: resource "aws_lambda_function" "data_retrieval" {
│
│ The plugin encountered an error, and failed to respond to the
│ plugin.(*GRPCProvider).ApplyResourceChange call. The plugin logs may
│ contain more details.
╵
Stack trace from the terraform-provider-aws_v4.61.0_x5 plugin:
panic: interface conversion: interface {} is string, not []interface {}

Relevant Error/Panic Output Snippet

Stack trace from the terraform-provider-aws_v4.61.0_x5 plugin:
panic: interface conversion: interface {} is string, not []interface {}
goroutine 32 [running]:
github.com/hashicorp/terraform-provider-aws/internal/service/rds.resourceClusterUpdate({0xe8838a0?, 0xc005a64810}, 0xc003051700, {0xd384cc0?, 0xc00045cc00})
	github.com/hashicorp/terraform-provider-aws/internal/service/rds/cluster.go:1282 +0x37b4
github.com/hashicorp/terraform-provider-aws/internal/provider.interceptedHandler[...].func1(0x0?, {0xd384cc0?, 0xc00045cc00?})
	github.com/hashicorp/terraform-provider-aws/internal/provider/intercept.go:94 +0x175
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).update(0xe8838a0?, {0xe8838a0?, 0xc00537b650?}, 0xd?, {0xd384cc0?, 0xc00045cc00?})
	github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/schema/resource.go:736 +0x87
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).Apply(0xc0016922a0, {0xe8838a0, 0xc00537b650}, 0xc00531d6c0, 0xc003051580, {0xd384cc0, 0xc00045cc00})
	github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/schema/resource.go:847 +0x83a
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).ApplyResourceChange(0xc00174fbc0, {0xe8838a0?, 0xc00537b530?}, 0xc0033898b0)
	github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/schema/grpc_provider.go:1021 +0xe8d
github.com/hashicorp/terraform-plugin-mux/tf5muxserver.muxServer.ApplyResourceChange({0xc003158150, 0xc0031581b0, {0xc001be86e0, 0x2, 0x2}, {0x0, 0x0, 0x0}, {0x0, 0x0, ...}, ...}, ...)
	github.com/hashicorp/[email protected]/tf5muxserver/mux_server_ApplyResourceChange.go:27 +0x102
github.com/hashicorp/terraform-plugin-go/tfprotov5/tf5server.(*server).ApplyResourceChange(0xc0024fdd60, {0xe8838a0?, 0xc00537a810?}, 0xc005229340)
	github.com/hashicorp/[email protected]/tfprotov5/tf5server/server.go:818 +0x574
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_ApplyResourceChange_Handler({0xd0899e0?, 0xc0024fdd60}, {0xe8838a0, 0xc00537a810}, 0xc0052292d0, 0x0)
	github.com/hashicorp/[email protected]/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:385 +0x170
google.golang.org/grpc.(*Server).processUnaryRPC(0xc00082a000, {0xe892fa0, 0xc00496b520}, 0xc005379680, 0xc002ca2d20, 0x150d5e00, 0x0)
	google.golang.org/[email protected]/server.go:1336 +0xd23
google.golang.org/grpc.(*Server).handleStream(0xc00082a000, {0xe892fa0, 0xc00496b520}, 0xc005379680, 0x0)
	google.golang.org/[email protected]/server.go:1704 +0xa2f
google.golang.org/grpc.(*Server).serveStreams.func1.2()
	google.golang.org/[email protected]/server.go:965 +0x98
created by google.golang.org/grpc.(*Server).serveStreams.func1
	google.golang.org/[email protected]/server.go:963 +0x28a
Error: The terraform-provider-aws_v4.61.0_x5 plugin crashed!
This is always indicative of a bug within the plugin. It would be immensely
helpful if you could report the crash with the plugin's maintainers so that it
can be fixed. The output above should help diagnose the issue.

Terraform Configuration Files

Not permitted to share, sorry.

Steps to Reproduce

It started with upgrading to v4.61. Doesn't seem to be resource specific.

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

None

[github-actions]

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[ewbankkit]

terraform-provider-aws/internal/service/rds/cluster.go

Lines 1281 to 1285 in 874f13a

	if d.HasChange("master_password") {
	if v, ok := d.GetOk("master_password"); ok && len(v.([]interface{})) > 0 && v.([]interface{}) != nil {
	input.MasterUserPassword = aws.String(v.(string))
	}
	}

Relates #28848.

[github-actions]

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