Confusing error message if property not found when ConstructorBinding is used

[jnizet]

When executing the following application:

package com.example.demo

import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.context.properties.ConfigurationProperties
import org.springframework.boot.context.properties.ConstructorBinding
import org.springframework.boot.runApplication

@SpringBootApplication
class BadErrorMessageApplication

@ConfigurationProperties(prefix = "test")
@ConstructorBinding
class MyProperties(val foo: String, val bar: String)

fun main(args: Array<String>) {
    runApplication<BadErrorMessageApplication>(*args)
}

with the following application.yml file:

test:
  # foo: hello
  bar: world

where foo is intentionally commented out, the application fails to start (as expected), but with a confusing error message:

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to bind properties under 'test' to com.example.demo.MyProperties:

    Property: test.bar
    Value: world
    Origin: class path resource [application.yml]:3:8
    Reason: Parameter specified as non-null is null: method com.example.demo.MyProperties.<init>, parameter foo

Action:

Update your application's configuration

The Reason part is correct: the parameter foo is missing. But the Property is incorrect: what is missing is the property foo, not the property bar. And the Value: world is irrelevant to the problem, too.

[snicoll]

I might have been too quick to close #17908. Thanks @jnizet!