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The following program causes a segmentation fault when run, instead of the NullPointerException one would expect. -------- public class NullPointerExceptionTest { public static void main(String[] args) { ((Integer) null).intValue(); } } -------- Starting program: /home/debian/rolfwr/prg/testgcj/./NullPointerExceptionTest [...] Program received signal SIGSEGV, Segmentation fault. 0x400dfef9 in java.lang.Integer.intValue (this=null) at ../../../libjava/java/lang/Integer.java:60 60 return value; Current language: auto; currently java (gdb) bt #0 0x400dfef9 in java.lang.Integer.intValue (this=null) at ../../../libjava/java/lang/Integer.java:60 #1 0x804af63 in NullPointerExceptionTest.main (args=@8081ff0) at NullPointerExceptionTest.java:3 #2 0x4013160a in gnu::gcj::runtime::FirstThread::run (this=@8064ea0) [...] Other one-liners that trigger the same problem: ((String) null).length(); ((java.util.Vector) null).size(); Boolean ref = null; ref.booleanValue(); I've compiled/run with gcj/libgcj pulled from CVS on 27. March. gcc version 2.96 20000327 (experimental) on i586-pc-linux-gnu -- Rolf W. Rasmussen
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