flutter混合开发运行报错：VM snapshot must be valid. /Check failed: vm. Must be able to initialize the VM.

VM snapshot must be valid. 
Check failed: vm. Must be able to initialize the VM.

project.android.libraryVariants.all { variant ->
    def targetAssets = "${project.buildDir}/intermediates/flutter/${variant.name}"
    def customSourceSet = variant.getSourceSets()[0]
    if (customSourceSet instanceof com.android.build.gradle.internal.api.DefaultAndroidSourceSet) {
        customSourceSet = (DefaultAndroidSourceSet)customSourceSet
        customSourceSet.getAssets().srcDirs(targetAssets)
    }
}

change
variant.outputs[0].processResources.dependsOn(copyFlutterAssetsTask)
to
variant.outputs[0].processResources.dependsOn(flutterTask)