When using the retention property in logs.LogGroup and provide the value of a parameter, it throws an error that the number is negative: retentionInDays must be positive, got -1.888154589708755e+289. This exception seems to be thrown by the LogGroup.

Here is the CfnParameter:

const retentionInDays = new cdk.CfnParameter(this, "RetentionInDays", { default: 30, type: "Number" });

The log group:

new logs.LogGroup(this, "PreAuthLogGroup", {
  logGroupName: "/aws/lambda/"+preAuthFunction.functionName,
  retention: retentionInDays.valueAsNumber
});

Reproduction Steps

1. Create a stack with the two resources mentioned above.
2. Run cdk synth.

Error Log

retentionInDays must be positive, got -1.888154589708755e+289

Environment

• CLI Version : 1.27.0
• Framework Version: 1.27.0
• OS : MacOS
• Language : Typescript

Other

This is 🐛 Bug Report