I interrupted a build with control-C. The next time I ran gradle, I got:
org.gradle.api.GradleException: Could not load compiled classes for build file '/path/to/project/build.gradle' from cache.

I tried the --no-opt flag without success. What did fix it was to remove ~/.gradle, which was kinda drastic. I saved the old ~/.gradle directory if someone needs me to do any forensics on it.

Here's the stacktrace:

• Exception is:
  org.gradle.api.GradleException: Could not load compiled classes for build file '/home/canderson/Backend/build.gradle' from cache.
  at org.gradle.groovy.scripts.DefaultScriptCompilationHandler.loadFromDir(DefaultScriptCompilationHandler.java:144)
  at org.gradle.groovy.scripts.CachingScriptCompilationHandler.loadFromDir(CachingScriptCompilationHandler.java:41)
  at org.gradle.groovy.scripts.DefaultScriptCompilerFactory$ScriptCompilerImpl.loadViaCache(DefaultScriptCompilerFactory.java:93)
  at org.gradle.groovy.scripts.DefaultScriptCompilerFactory$ScriptCompilerImpl.compile(DefaultScriptCompilerFactory.java:69)
  at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:121)
  at org.gradle.configuration.BuildScriptProcessor.evaluate(BuildScriptProcessor.java:38)
  at org.gradle.configuration.DefaultProjectEvaluator.evaluate(DefaultProjectEvaluator.java:38)
  at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:491)
  at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:69)
  at org.gradle.api.internal.project.ProjectInternal$evaluate.call(Unknown Source)
  at org.gradle.configuration.BuildConfigurer$_closure1.doCall(BuildConfigurer.groovy:41)
  at $Proxy6.execute(Unknown Source)
  at org.gradle.api.internal.project.AbstractProject.configure(AbstractProject.java:467)
  at org.gradle.api.internal.project.AbstractProject.allprojects(AbstractProject.java:462)
  at org.gradle.api.Project$allprojects.call(Unknown Source)
  at org.gradle.configuration.BuildConfigurer.process(BuildConfigurer.groovy:48)
  at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:136)
  at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:107)
  at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:75)
  at org.gradle.launcher.Main.execute(Main.java:93)
  at org.gradle.launcher.Main.main(Main.java:42)
  at org.gradle.launcher.GradleMain.main(GradleMain.java:49)
  Caused by: java.lang.ClassNotFoundException: build_gradle_4c47cbfa1b3d46865e24d8edf636bd13
  at org.gradle.groovy.scripts.DefaultScriptCompilationHandler.loadFromDir(DefaultScriptCompilationHandler.java:142)
  ... 21 common frames omitted