From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rolf W. Rasmussen" To: java-discuss@sourceware.cygnus.com Subject: Some null pointer method invocations causes segmentation fault Date: Mon, 27 Mar 2000 14:52:00 -0000 Message-id: <20000328005223.A21555@apal.ii.uib.no> X-SW-Source: 2000-03/msg00160.html 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rolf W. Rasmussen" To: java-discuss@sourceware.cygnus.com Subject: Some null pointer method invocations causes segmentation fault Date: Sat, 01 Apr 2000 00:00:00 -0000 Message-ID: <20000328005223.A21555@apal.ii.uib.no> X-SW-Source: 2000-q1/msg00576.html Message-ID: <20000401000000.gV2DhbxesPuL5BXUgimivzWBSSnbRzVmpZGburZGRXY@z> 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