[antlr-interest] Problem with C target output on example C grammar

[Kamil Burzynski]

Hello,

I am new to this list as well as to antlr, so please be gentle ;) My goal
is to have flexible C/C++ parser, after trying yacc/lex for a short while I
decided to go to antlr. Since I want my project in C++, it seems, that
antlr 3.1b is better than official 3.0.1. Anyway, I have installed
antlr-2008-03-13.12.tar.gz with libantlr3c-3.1b2.tar.gz and tried to
compile some examples from examples-v3.1b1.tar.gz. The simple ones do work,
indeed. However, when I try to run C grammar, it fails with segfault. Here
is some info (I have cut off a bunch of 'Created a symbolpp class'
messages):

988 05:34:46 andLinux ~/Warsztat/antlr/examples-v3/C/C$ java org.antlr.Tool
C.g3pl
ANTLR Parser Generator Version 3.1b1 (??) 1989-2007
Generating CParser.c
Generating CParser.h
Generating CLexer.c
Generating CLexer.h
989 05:35:24 andLinux ~/Warsztat/antlr/examples-v3/C/C$ g++ *.c -o main -I.
-L /usr/local/lib/ -lantlr3c -ggdb
990 05:35:32 andLinux ~/Warsztat/antlr/examples-v3/C/C$ gdb main
GNU gdb 6.6-debian
Copyright (C) 2006 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 "i486-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /home/nopik/Warsztat/antlr/examples-v3/C/C/main
Including file 'jimtest.h'
Created a symbolpp class
define type size_t
[cut many similar messages]
Created a symbolpp class
define type fd_mask

Program received signal SIGSEGV, Segmentation fault.
0x08054f75 in direct_declarator (ctx=0x80b0868) at CParser.c:16284
16284 if (
(SCOPE_TOP(declaration))->isTypedef)
Current language: auto; currently c++
(gdb) where
#0 0x08054f75 in direct_declarator (ctx=0x80b0868) at CParser.c:16284
#1 0x08055897 in declarator (ctx=0x80b0868) at CParser.c:16156
#2 0x0806efa4 in function_definition (ctx=0x80b0868) at CParser.c:13775
#3 0x0806f5c3 in external_declaration (ctx=0x80b0868) at CParser.c:13652
#4 0x0806f89e in translation_unit (ctx=0x80b0868) at CParser.c:13543
#5 0x0806fbef in main (argc=1, argv=0xbf9b45a4) at main.c:188
(gdb) print ctx
$2 = (pCParser) 0x80b0868
(gdb) print ctx->pCParser_declarationTop
$3 = (pCParser_declaration_SCOPE) 0x0
(gdb) quit

Indeed, when in direct_declarator I change if( $declaration::isTypedef ) to
e.g. if( false ), program do not crash, though report a bunch of errors.

Any ideas? Maybe I am using mismatched versions (e.g. old examples) or
what? Original author must have ran it at least once, so probably I have
messed something ;)

PS. It seems, that antlr banner says wrong year - it should be 2008 instead
of 2007, right? :)


-- 
Best regards from
Kamil Burzynski