Eclipse and gradle 4.8.1 and 5.2.1 - Could not find method application() for arguments

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I have this eclipse project that was made in eclipse by creating a gradle project. all worked well for weeks. Then i get a:

Could not run build action using Gradle distribution ‘https://services.gradle.org/distributions/gradle-4.8.1-bin.zip’.
Build file ‘D:\ray\dev\conradapps\sudoku2\build.gradle’ line: 25
A problem occurred evaluating root project ‘sudoku2’.
Could not find method application() for arguments [build_28g3nee7dn9novehuw2eeipk9$_run_closure4@255cd3c1] on root project ‘sudoku2’ of type org.gradle.api.Project. build.gradle line 25 /sudoku2 Gradle Error Marker

my build file looks like:

import java.io.IOException;
import java.nio.file.;
import java.util.;
plugins {
id ‘java’
id ‘application’
id ‘distribution’
}

repositories {
jcenter()
}
sourceCompatibility = ‘1.8’
targetCompatibility = ‘1.8’
dependencies {
compile group: ‘commons-cli’, name: ‘commons-cli’, version: ‘1.3.1’
testImplementation ‘junit:junit:4.12’
}
String myMainClass=‘p.Main’
jar {
manifest {
attributes(‘Main-Class’: myMainClass)
}
}
application {
mainClassName = myMainClass
}
println(“java version is: ${JavaVersion.current()}”)

running gradlew test from the command line gets the same thing (4.8.1)

running gradle test works (5.2.1)

doing a: D:\ray\dev\conradapps\sudoku2>gradlew wrapper --gradle-version 5.2.1 gets:

FAILURE: Build failed with an exception.

  • Where:
    Build file ‘D:\ray\dev\conradapps\sudoku2\build.gradle’ line: 25

  • What went wrong:
    A problem occurred evaluating root project ‘sudoku2’.

Could not find method application() for arguments [build_28g3nee7dn9novehuw2ee
ipk9$_run_closure4@1c477e80] on root project ‘sudoku2’ of type org.gradle.api.Pr
oject.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug
    option to get more log output. Run with --scan to get full insights.

  • Get more help at https://help.gradle.org

BUILD FAILED in 3s

removing the offending: application { mainClassName = myMainClass } makes the command line gradlew and the wrapper upgrade work.

adding the application { … } back in and closing and opening the project makes the Could not find method application() for arguments in eclipse go sway.

so i was able to work around this.