0.8 regression: IndexOutOfBoundsException when collecting dependencies

[ZacSweers]

Working on trying to figure out which file it sees this on

Caused by: java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
        at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
        at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
        at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
        at java.base/java.util.Objects.checkIndex(Objects.java:385)
        at java.base/java.util.ArrayList.get(ArrayList.java:427)
        at cash.grammar.kotlindsl.utils.DependencyExtractor.findIdentifier(DependencyExtractor.kt:253)
        at cash.grammar.kotlindsl.utils.DependencyExtractor.parseDependencyDeclaration(DependencyExtractor.kt:154)
        at cash.grammar.kotlindsl.utils.DependencyExtractor.collectDependencies(DependencyExtractor.kt:48)
        at com.squareup.sort.kotlin.KotlinSorter.enterNamedBlock(KotlinSorter.kt:84)
        at com.squareup.cash.grammar.KotlinParser$NamedBlockContext.enterRule(KotlinParser.java:1491)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.enterRule(ParseTreeWalker.java:50)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:33)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:36)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:36)
        at cash.grammar.kotlindsl.parse.Parser.listener(Parser.kt:96)
        at com.squareup.sort.kotlin.KotlinSorter$Companion.of(KotlinSorter.kt:182)
        at com.squareup.sort.Sorter$Companion.of(Sorter.kt:20)
        at com.squareup.sort.SortCommand$sort$1.invoke(SortCommand.kt:118)
        at com.squareup.sort.SortCommand$sort$1.invoke(SortCommand.kt:116)
        at com.squareup.sort.SortCommand.sort$lambda$0(SortCommand.kt:116)

[ZacSweers]

I'm not 100% sure but I think this reproduces it in a slightly different way: slackhq/foundry#934

If you clone that branch and run ./gradlew sortDependencies it'll crash just before the trace above does

> Task :agp-handlers:agp-handler-api:sortDependencies FAILED
Exception in thread "main" java.lang.NullPointerException
        at cash.grammar.kotlindsl.utils.DependencyExtractor.parseDependencyDeclaration(DependencyExtractor.kt:189)
        at cash.grammar.kotlindsl.utils.DependencyExtractor.collectDependencies(DependencyExtractor.kt:48)
        at com.squareup.sort.kotlin.KotlinSorter.enterNamedBlock(KotlinSorter.kt:84)
        at com.squareup.cash.grammar.KotlinParser$NamedBlockContext.enterRule(KotlinParser.java:1491)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.enterRule(ParseTreeWalker.java:50)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:33)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:36)
        at org.antlr.v4.runtime.tree.ParseTreeWalker.walk(ParseTreeWalker.java:36)
        at cash.grammar.kotlindsl.parse.Parser.listener(Parser.kt:96)
        at com.squareup.sort.kotlin.KotlinSorter$Companion.of(KotlinSorter.kt:182)
        at com.squareup.sort.Sorter$Companion.of(Sorter.kt:20)
        at com.squareup.sort.SortCommand$sort$1.invoke(SortCommand.kt:118)
        at com.squareup.sort.SortCommand$sort$1.invoke(SortCommand.kt:116)
        at com.squareup.sort.SortCommand.sort$lambda$0(SortCommand.kt:116)

The failing file seems uninteresting on its own

/*
 * Copyright (C) 2023 Slack Technologies, LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
plugins {
  kotlin("jvm")
  alias(libs.plugins.mavenPublish)
  alias(libs.plugins.lint)
}

dependencies {
  lintChecks(libs.gradleLints)
  implementation(libs.guava)

  compileOnly(gradleApi())
  compileOnly(libs.agp)

  testImplementation(gradleApi())
  testImplementation(libs.agp)
  testImplementation(libs.junit)
  testImplementation(libs.truth)
}

[ZacSweers]

after testing, it looks like the problem is the gradleApi() usages. If I comment them out, they work