Serialization of flatRate and isFlatRate are mixed up.

[briansheppard-toast]

Describe the bug
When an object has properties named foo and isFoo then the serialization gets the properties and values mixed up.

Version information
2.12.7

To Reproduce
// Kotlin code:

data class FlatRateClass(val isFlatRate: Boolean, val flatRate: Double)
val testObject = FlatRateClass(true, 23.75)
val actual = jacksonObjectMapper().writeValueAsString(testObject)

Expected behavior
I would like actual to be {"isFlatRate":true,"flatRate":23.75}

But actual is {"isFlatRate":23.75}. This mixes the name of the boolean property with the value of the Double property.

Additional context
I tried a number of annotations, using JsonProperty and ignoring isGetter fields, but could not make any serialization that would round-trip from object to string and back.

[cowtowncoder]

Kotlin-specific, wrong repo, will transfer.

[briansheppard-toast]

thanks

[k163377]

This issue will be fixed by #630 and therefore closed as a duplicate.