This is probably a duplicate of something that has been filed before,
but my cursory search failed to turn up any similar tickets.

GCJ rejects code that both Sun and Eclipse compilers accept.

Here's the test case:

| $ cat Reluctant.java
| public class Reluctant {
|     private Reluctant internalInstance = new Reluctant();
|
|     public Reluctant() throws Exception {
|         throw new Exception("I'm not coming out");
|     }
|
|     public static void main(String[] args) {
|         try {
|             Reluctant b = new Reluctant();
|             System.out.println("Surprise!");
|         } catch (Exception ex) {
|             System.out.println("I told you so");
|         }
|     }
| }

The test comes from
http://www.javapuzzlers.com/java-puzzlers.zip


Here's what I'm using

| $ gcj -v
| Using built-in specs.
| Reading specs from /usr/lib/gcc/x86_64-redhat-linux/4.1.0/libgcj.spec
| rename spec lib to liborig
| Target: x86_64-redhat-linux
| Configured with: ../configure --prefix=/usr --mandir=/usr/share/man \
|  --infodir=/usr/share/info --enable-shared --enable-threads=posix \
|  --enable-checking=release --with-system-zlib --enable-__cxa_atexit \
|  --disable-libunwind-exceptions --enable-libgcj-multifile \
|  --enable-languages=c,c++,objc,obj-c++,java,fortran,ada \
|  --enable-java-awt=gtk --disable-dssi \
|  --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre \
|  --with-cpu=generic --host=x86_64-redhat-linux
|
| Thread model: posix
| gcc version 4.1.0 20060304 (Red Hat 4.1.0-3)

Here's the compilation error the above code triggers:

| $ gcj -C Reluctant.java
| Reluctant.java: In class 'Reluctant':
| Reluctant.java: In method 'finit$()':
| Reluctant.java:2: error: Exception $-1òøjava.lang.Exceptionòù can't be
thrown in initializer.
|     private Reluctant internalInstance = new Reluctant();
|                                                 ^
| 1 error

Here's what the Eclipse compiler has to say:

| $ ecj -v
| Eclipse Java Compiler v_585_R31x, 3.1.2 release, Copyright IBM Corp 2000,
2006. All rights reserved.
| $ ecj Reluctant.java
| ----------
| 1. WARNING in Reluctant.java
|  (at line 2)
|       private Reluctant internalInstance = new Reluctant();
|                         ^^^^^^^^^^^^^^^^
| The field Reluctant.internalInstance is never read locally
| ----------
| ----------
| 2. WARNING in Reluctant.java
|  (at line 10)
|       Reluctant b = new Reluctant();
|                 ^
| The local variable b is never read
| ----------
| 2 problems (2 warnings)

No errors.

Same with Sun's javac:

| $ javac -version 2>&1 | head -n1
| javac 1.5.0_06
| $ javac -Xlint Reluctant.java
| $ echo $?
| 0


-- 
           Summary: GCJ rejects valid code (for Sun's measure of "valid')
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: vnasardinov at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27101