AssertionError during LVT generation with javac 8u20

[Vicente-Arturo Romero-Zaldivar]

Hi Liam,

Thanks for your mail and for the reduced test case. The issue you are 
reporting has already been fixed in JDK 9 [1] and JDK 8udev [2]. This 
was targeted by the fix for bug [3] also backported into 8udev see [4]. 
The corresponding changeset can be found at [5].

Thanks,
Vicente

[1] http://hg.openjdk.java.net/jdk9/dev/
[2] http://hg.openjdk.java.net/jdk8u/jdk8u-dev/
[3] https://bugs.openjdk.java.net/browse/JDK-8047719
[4] https://bugs.openjdk.java.net/browse/JDK-8048587
[5] http://hg.openjdk.java.net/jdk9/jdk9/langtools/rev/855f8c7337eb

On 10/08/2014 11:03 AM, Liam Miller-Cushon wrote:
> It looks like the fix for JDK-8037937 introduced a different 
> LVT-related AssertionError. The crash bisects down to 
> http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/rev/372fd7283bf0
>
> Repro:
>
> === Test.java ===
> public class Test {
>   void m(Object[] xs) {
>     {
>       Object[] ys;
>       int i;
>
>       for (Object x : xs) {
>       }
>
>       if (xs != null) {
>         i = 0;
>       }
>     }
>   }
> }
> ===
>
> $ javac -g Test.java
> An exception has occurred in the compiler (1.8.0_20). Please file a 
> bug at the Java Developer Connection 
> (http://java.sun.com/webapps/bugreport)  after checking the Bug Parade 
> for duplicates. Include your program and the following diagnostic in 
> your report.  Thank you.
> java.lang.AssertionError
> at com.sun.tools.javac.util.Assert.error(Assert.java:126)
> at com.sun.tools.javac.util.Assert.check(Assert.java:45)
> at com.sun.tools.javac.jvm.ClassWriter.writeCode(ClassWriter.java:1189)
> at com.sun.tools.javac.jvm.ClassWriter.writeMethod(ClassWriter.java:1110)
> at com.sun.tools.javac.jvm.ClassWriter.writeMethods(ClassWriter.java:1602)
> at 
> com.sun.tools.javac.jvm.ClassWriter.writeClassFile(ClassWriter.java:1692)
> at com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1620)
> at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:746)
> at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1572)
> at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1536)
> at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:901)
> at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:860)
> at com.sun.tools.javac.main.Main.compile(Main.java:523)
> at com.sun.tools.javac.main.Main.compile(Main.java:381)
> at com.sun.tools.javac.main.Main.compile(Main.java:370)
> at com.sun.tools.javac.main.Main.compile(Main.java:361)
> at com.sun.tools.javac.Main.compile(Main.java:56)
> at com.sun.tools.javac.Main.main(Main.java:42)
>

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