schema.EnvDefaultFunc doesn't work with int resource attributes

[rudo-thomas]

schema.EnvDefaultFunc doesn't work when used as DefaultFunc on a TypeInt resource attribute; works fine with TypeString, TypeBool, TypeFloat attributes.

SDK version

github.com/hashicorp/terraform-plugin-sdk/v2 v2.6.1

Steps to Reproduce

Run go test in this repository: https://github.com/rudo-thomas/terraform-sdk-default-int-from-env-bug (a snapshot at b3f1b82 is
attached).

Relevant provider source code

"i": &schema.Schema{
	Type:        schema.TypeInt,
	Optional:    true,
	DefaultFunc: schema.EnvDefaultFunc("SOME_VAR", nil),
}

Expected Behavior

The test should pass.

Actual Behavior

Error: Attribute must be a whole number, got 1

Note: The 1 in the error message is of string type, which I found out by printing the type at

terraform-plugin-sdk/helper/schema/schema.go

Line 2053 in 5747fc3

Summary: fmt.Sprintf("Attribute must be a whole number, got %v", raw),

Workaround

To work this around, the DefaultFunc set in the Schema can wrap schema.EnvDefaultFunc(...)() and convert the string to an int.

[rudo-thomas]

PR #841 fixes this on main (past v2.10.1).

[github-actions]

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