[e-lang] Happy Tenth Birthday, E

[Mark Seaborn]

Allen Short <washort at divmod.com> wrote:

> I plan to use Ecru alongside Python until it's complete enough to
> write applications with on its own. I've written a Python bridge
> module that can run code in the Ecru VM and exchange objects with
> it. I've also written a parser for E and an expander to Kernel-E in
> Python and a primitive REPL based on them.  (Eventually, I hope to
> rewrite these in E as well, and reuse as much of the existing code
> for 'rune' as possible.)

Looks interesting.

I tried it on Debian lenny i386.  Some simple expressions in the REPL
sometimes work but other times produce warnings or segfaults:

$ sudo apt-get install automake autoconf check libgc-dev libgmp3-dev python2.5-dev
$ ./autogen.sh --prefix=$(pwd)/prefix
$ PATH=prefix/bin PYTHONPATH=prefix/lib/python2.5/site-packages/ LD_LIBRARY_PATH=prefix/lib/ monte
? "foo"+"bar"

(process:25014): GLib-GIO-CRITICAL **: g_output_stream_write_all: assertion `G_IS_OUTPUT_STREAM (stream)' failed

(process:25014): GLib-GIO-CRITICAL **: g_memory_output_stream_get_data: assertion `G_IS_MEMORY_OUTPUT_STREAM (ostream)' failed

(process:25014): GLib-GIO-CRITICAL **: g_seekable_tell: assertion `G_IS_SEEKABLE (seekable)' failed

? "foo"
foo

? "foo"+"bar"
foobar

? 1+1
2

$ PATH=prefix/bin PYTHONPATH=prefix/lib/python2.5/site-packages/ LD_LIBRARY_PATH=prefix/lib/ monte
? 1+1

(process:25022): GLib-GIO-CRITICAL **: g_output_stream_write_all: assertion `G_IS_OUTPUT_STREAM (stream)' failed
Segmentation fault (core dumped)


Here is a backtrace I got from gdb:

? 1+1

(process:23019): GLib-GIO-CRITICAL **: g_output_stream_write_all: assertion `G_IS_OUTPUT_STREAM (stream)' failed

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xf7e3c8c0 (LWP 23019)]
0xf7be3081 in g_string_new () from /usr/lib/libglib-2.0.so
(gdb) bt
#0  0xf7be3081 in g_string_new () from /usr/lib/libglib-2.0.so
#1  0xf7a90f14 in e_make_problem (complaint=0x32 <Address 0x32 out of bounds>, 
    irritant=
        {script = 0xf7aa8ac4, data = {fixnum = 0, bignum = 0x0, chr = 0, gstring = 0x0, float64 = 0x0, refs = 0x0, other = 0x0}}) at src/elib.h:302
#2  0xf7a89bda in e_throw_pair (complaint=0x32 <Address 0x32 out of bounds>, 
    irritant=
        {script = 0x32, data = {fixnum = 0, bignum = 0x0, chr = 0, gstring = 0x0, float64 = 0x0, refs = 0x0, other = 0x0}}) at src/invoke.c:39
#3  0xf7a90878 in writer_print (self=
        {script = 0xf7aa8a9c, data = {fixnum = 138881408, bignum = 0x8472980, chr = 10624, gstring = 0x8472980, float64 = 0x8472980, refs = 0x8472980, other = 0x8472980}}, args=0xffbd7394) at src/prim.c:1198
#4  0xf7a898e6 in e_call (receiver=
        {script = 0xf7aa8a9c, data = {fixnum = 138881408, bignum = 0x8472980, chr = 10624, gstring = 0x8472980, float64 = 0x8472980, refs = 0x8472980, other = 0x8472980}}, selector=0xf7aa8ad4, args=0xffbd7394) at src/invoke.c:128
#5  0xf7a92312 in fixnum_printOn (self=
        {script = 0xf7aa8ac4, data = {fixnum = 2, bignum = 0x2, chr = 2, gstring = 0x2, float64 = 0x2, refs = 0x2, other = 0x2}}, args=0xffbd7430)
    at src/elib.h:204
#6  0xf7a898e6 in e_call (receiver=
        {script = 0xf7aa8ac4, data = {fixnum = 2, bignum = 0x2, chr = 2, gstring = 0x2, float64 = 0x2, refs = 0x2, other = 0x2}}, selector=0xf7aa8aec, 
    args=0xffbd7430) at src/invoke.c:128
#7  0xf7a90837 in writer_print (self=
        {script = 0xf7aa8a9c, data = {fixnum = 138881408, bignum = 0x8472980, chr = 10624, gstring = 0x8472980, float64 = 0x8472980, refs = 0x8472980, other = 0x8472980}}, args=0xf7dee9e0) at src/elib.h:204
#8  0xf7a92600 in writer_println (self=
        {script = 0xf7aa8a9c, data = {fixnum = 138881408, bignum = 0x8472980, chr = 10624, gstring = 0x8472980, float64 = 0x8472980, refs = 0x8472980, other = 0x8472980}}, args=0xf7dee9e0) at src/prim.c:1210
#9  0xf7a898e6 in e_call (receiver=
        {script = 0xf7aa8a9c, data = {fixnum = 138881408, bignum = 0x8472980, chr = 10624, gstring = 0x8472980, float64 = 0x8472980, refs = 0x8472980, other = 0x8472980}}, selector=0xf7dee0e0, args=0xf7dee9e0) at src/invoke.c:128
#10 0xf7db5e47 in ffi_call_SYSV ()
   from /usr/lib/python2.5/lib-dynload/_ctypes.so
#11 0xf7db5cce in ffi_call () from /usr/lib/python2.5/lib-dynload/_ctypes.so
#12 0xf7db07f4 in _CallProc () from /usr/lib/python2.5/lib-dynload/_ctypes.so
#13 0xf7da9f2a in ?? () from /usr/lib/python2.5/lib-dynload/_ctypes.so
#14 0xf7a89840 in ?? () from prefix/lib/libecru.so
#15 0xf7dd5284 in ?? ()
#16 0x00001005 in ?? ()
#17 0xf7ddb374 in ?? ()
#18 0x081ec49c in ?? ()
#19 0x00000000 in ?? ()


Here is a patch to add a GNOME-style autogen.sh script:

=== added file 'autogen.sh'
--- autogen.sh  1970-01-01 00:00:00 +0000
+++ autogen.sh  2008-07-20 19:07:10 +0000
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -e
+
+srcdir=`dirname $0`
+test -z "$srcdir" && srcdir=.
+cd $srcdir
+
+autoheader
+automake
+autoconf
+
+exec $srcdir/configure "$@"

Regards,
Mark