ADDITIONAL SYSTEM INFORMATION :
System description:
Lenovo T430s / Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz / 16 GB RAM.

OS: Fedora Workstation 28

uname -a:

Linux lapos 4.18.7-200.fc28.x86_64 #1 SMP Mon Sep 10 15:44:45 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

java -version:

OpenJDK Runtime Environment (build 10.0.2+13)
OpenJDK 64-Bit Server VM (build 10.0.2+13, mixed mode)


A DESCRIPTION OF THE PROBLEM :
java.lang.AssertionError is thrown by both the current Java 9 and Java 10 compilers without any further details to elicit the nature of the issue. The code compiles without any issues on Java 8 and earlier releases (>= 1.6.0), or using Eclipse's compiler (ecj).

REGRESSION : Last worked in version 8u181

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try compile code (via ant build).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compilation succeeds, or else points to an error in the source code that is to be compiled.
ACTUAL -
A compiler error is thrown, of type java.lang.AssertionError

---------- BEGIN SOURCE ----------
http://www.sigmyne.com/crush/crush-src-2.42-a2-d18.tar.gz

Since I have not been able to pinpoint what in the source code is causing the compiler error, I am submitting the entire source tree, complete with a build.xml file for ant. Sorry, it's the best I can do at this point...
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Avoid Java 9 & 10, and compile with Java 8 or earlier (>= 1.6.0), or with ecj.

Crash reported
[javac] An exception has occurred in the compiler (10.0.2). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
    [javac] java.lang.AssertionError
    [javac] at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
    [javac] at jdk.compiler/com.sun.tools.javac.util.Assert.check(Assert.java:46)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Pool.put(Pool.java:112)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.makeRef(Gen.java:259)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitTypeCast(Gen.java:2012)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCTypeCast.accept(JCTree.java:2018)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:817)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitUnary(Gen.java:1842)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCUnary.accept(JCTree.java:1954)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:817)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genArgs(Gen.java:836)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitNewClass(Gen.java:1737)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1689)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:817)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitSelect(Gen.java:2081)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2110)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:817)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitApply(Gen.java:1645)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:817)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitExec(Gen.java:1581)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1452)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:595)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:630)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:616)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStats(Gen.java:667)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1029)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1020)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:595)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:630)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:901)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:864)
    [javac] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:866)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:595)
    [javac] at jdk.compiler/com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2182)
    [javac] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:748)
    [javac] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1627)
    [javac] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1595)
    [javac] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:965)
    [javac] at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:306)
    [javac] at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:165)
    [javac] at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:57)
    [javac] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [javac] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    [javac] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    [javac] at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    [javac] at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56)
    [javac] at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1153)
    [javac] at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:930)
    [javac] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    [javac] at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    [javac] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    [javac] at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    [javac] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    [javac] at org.apache.tools.ant.Task.perform(Task.java:348)
    [javac] at org.apache.tools.ant.Target.execute(Target.java:435)
    [javac] at org.apache.tools.ant.Target.performTasks(Target.java:456)
    [javac] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    [javac] at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    [javac] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    [javac] at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    [javac] at org.apache.tools.ant.Main.runBuild(Main.java:851)
    [javac] at org.apache.tools.ant.Main.startAnt(Main.java:235)
    [javac] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    [javac] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)