Jenkins. How to get value from ERROR?

Question

Jenkins

Installed Jenkins 2.89.4 + Pipeline plugins Pipeline
code:

pipeline{
    agent any
    stages{
        stage('INIT'){
            steps{
                script{
                    error 'My Error in Stage'
                }
            }
        }
    }
    post{
        success {
            echo "post success"
        }
        failure{
            echo "post failure"
        }
    }
}

In the Jenkins log, we see the following lines:

Running in Durability level: MAX_SURVIVABILITY
[Pipeline] node
Running on Jenkins in d:\tmp\JenkinsWS\TEST
[Pipeline] {
[Pipeline] stage
[Pipeline] { (INIT)
[Pipeline] script
[Pipeline] {
[Pipeline] error
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Declarative: Post Actions)
[Pipeline] echo
post failure
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: My Error in Stage
Finished: FAILURE

Question: how to get the value My Error in Stage in the post.failure block