Bug 18130

I doubt this code is valid, but anyway, GCC should display a proper
error message rather than just crash.

I am using a GCC checked out from CVS HEAD yesterday.
I also get an ICE with GCC 3.3.4-11 and 3.4.1-17 from Debian,
but i haven't tried the corresponding FSF releases.

--- Source file ---

class ICE_InnerClass {
    class First {
    }
    
    static class Second extends First {
    }
}

--- Invocation ---

$ gcj -v -C ICE_InnerClass.java 
Reading specs from
/home/kalle/stow/gcc/i386-pc-linux-gnu/bin/../lib/gcc/i386-pc-linux-gnu/4.0.0/specs
Configured with: /home/kalle/src/FOREIGN-CVS/gcc/configure --prefix=/home/kalle
--exec-prefix=/home/kalle/i386-pc-linux-gnu --host=i386-pc-linux-gnu
--build=i386-pc-linux-gnu --enable-maintainer-mode --with-x-toolkit=gtk
Thread model: posix
gcc version 4.0.0 20041023 (experimental)

/home/kalle/stow/gcc/i386-pc-linux-gnu/bin/../libexec/gcc/i386-pc-linux-gnu/4.0.0/jc1 ICE_InnerClass.java -quiet -dumpbase ICE_InnerClass.java -auxbase-strip
NONE -g1 -version -fsyntax-only -femit-class-files -o /dev/null
GNU Java version 4.0.0 20041023 (experimental) (i386-pc-linux-gnu)
	compiled by GNU C version 3.3.4 (Debian 1:3.3.4-11).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Class path starts here:
    /home/kalle/pikkuohjelmat/java/
   
/home/kalle/stow/gcc/i386-pc-linux-gnu/bin/../lib/gcc/../../../share/java/libgcj-4.0.0.jar/ (system) (zip)
ICE_InnerClass.java: In class 'ICE_InnerClass$Second':
ICE_InnerClass.java: In constructor '()':
ICE_InnerClass.java:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

--- Backtrace ---

$ gdb
/home/kalle/stow/gcc/i386-pc-linux-gnu/bin/../libexec/gcc/i386-pc-linux-gnu/4.0.0/jc1
GNU gdb 6.0-debian
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...
(gdb) set args ICE_InnerClass.java -quiet -dumpbase ICE_InnerClass.java
-auxbase-strip NONE -g1 -version -fsyntax-only -femit-class-files -o /dev/null
(gdb) run
Starting program:
/home/kalle/stow/gcc/i386-pc-linux-gnu/libexec/gcc/i386-pc-linux-gnu/4.0.0/jc1
ICE_InnerClass.java -quiet -dumpbase ICE_InnerClass.java -auxbase-strip NONE -g1
-version -fsyntax-only -femit-class-files -o /dev/null
GNU Java version 4.0.0 20041023 (experimental) (i386-pc-linux-gnu)
	compiled by GNU C version 3.3.4 (Debian 1:3.3.4-11).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Class path starts here:
    /home/kalle/pikkuohjelmat/java/
    /home/kalle/share/java/libgcj-4.0.0.jar/ (system) (zip)

Program received signal SIGSEGV, Segmentation fault.
java_complete_lhs (node=0x0) at parse.y:11606
11606	  if (TREE_TYPE (node) && TREE_CODE (node) != CONVERT_EXPR)
(gdb) backtrace
#0  java_complete_lhs (node=0x0) at parse.y:11606
#1  0x08076f44 in java_complete_tree (node=0x0) at parse.y:11568
#2  0x08071e5d in patch_method_invocation (patch=0x40197140, primary=0x0, 
    where=0x0, from_super=0, is_static=0x0, ret_decl=0xbffff634)
    at parse.y:10794
#3  0x08078d57 in java_complete_lhs (node=0x40197140) at parse.y:12076
#4  0x08076f44 in java_complete_tree (node=0x40197140) at parse.y:11568
#5  0x08077519 in java_complete_lhs (node=0x401613dc) at parse.y:11689
#6  0x08076f44 in java_complete_tree (node=0x401613dc) at parse.y:11568
#7  0x08069c88 in java_complete_expand_method (mdecl=0x401956cc)
    at parse.y:8243
#8  0x08068a50 in java_complete_expand_methods (class_decl=0x40190e80)
    at parse.y:7932
#9  0x08068571 in java_complete_expand_class (outer=0x40190a6c) at parse.y:7891
#10 0x080684ae in java_complete_expand_classes () at parse.y:7874
#11 0x0806dcbd in java_expand_classes () at parse.y:9199
#12 0x080c533b in java_parse_file (set_yydebug=0)
    at /home/kalle/src/FOREIGN-CVS/gcc/gcc/java/jcf-parse.c:1209
#13 0x083dc15f in compile_file ()
    at /home/kalle/src/FOREIGN-CVS/gcc/gcc/toplev.c:986
#14 0x083ddae5 in do_compile ()
    at /home/kalle/src/FOREIGN-CVS/gcc/gcc/toplev.c:2074
#15 0x083ddb55 in toplev_main (argc=0, argv=0xbffff934)
    at /home/kalle/src/FOREIGN-CVS/gcc/gcc/toplev.c:2106
#16 0x080da13b in main (argc=0, argv=0x0)
    at /home/kalle/src/FOREIGN-CVS/gcc/gcc/main.c:35