[standard:function-literal] Crash with reduntant lambda arrow

[lwasyl]

Expected Behavior

ktlint should not crash

Observed Behavior

ktlint crashes

Steps to Reproduce

fun foo(block: () -> Unit): Unit = foo { -> block() }

Your Environment

• Version of ktlint used: 1.0.1
• Relevant parts of the .editorconfig settings: none, although function-literal seems to be crashing even with ktlint_code_style = intellij_idea, whereas the documentation states the rule runs only with kotlin_official code style
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task): ktlint-gradle-plugin
• Version of Gradle used (if applicable): 8.3
• Operating System and version:

[paul-dingemans]

The function-literal rule is introduced in version 1.0.0. The documentation is incorrect. The rule is an experimental rule and will only be run when the the experimental rules are enabled.

Both documentation and rule need to be fixed. Tnx for reporting.