Hi,
I'm relatively new to Forth and I'm wondering if I'm doing something wrong or
if this is intended behavior or if this is a bug. I'm using gforth on GNU/Linux.
Executing the following gives me an error message and creates an empty 0 byte
file called blocks.fb:
s" Hello world!" 0 block place update save-buffers bye
I have attached the backtrace but it doesn't seem very helpful, all it says is
invalid memory address. So I then delete the file blocks.fb and try again, but
this time with block 1 instead:
s" Hello world!" 1 block place update save-buffers bye
and it successfully writes into the block and we can verify that it did indeed
write into it by starting gforth again and executing:
1 block count type Hello world! ok
So maybe block 0 will work now? I try to write into it again:
s" weird..." 0 block place update save-buffers bye
No errors this time, but when I start gforth again and try to read from it I
don't get the expected output:
0 block count type ok
So I looked at the blocks.fb file in a text editor and "weird..." was written
into it correctly and after a while I've figured that the following works after
starting gforth again:
1 block drop 0 block count type weird... ok
To me this seems like a bug where "0 block" doesn't initialize something that
"1 block" does. Either that or I'm using blocks the wrong way. Unfortunately I
could not find any simple examples on how to use blocks so I'm just going off
the docs and a few scraps of information on the internet that I could find.
Best Regards,
shtps
Gforth 0.7.3, Copyright (C) 1995-2008 Free Software Foundation, Inc.
Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license'
Type `bye' to exit
s" Hello world!" 0 block place update save-buffers bye
:1: Invalid memory address
s" Hello world!" 0 block place update >>>save-buffers<<< bye
Backtrace:
$7F4E85B882F0 throw
$7F4E866DCB88
$7F4E866E1A00
$7F4E866D8000
$7F4E866D2FD0
$7F4E85B882A0
$7F4E85B885C0 open-blocks
$7F4E85B886A0 get-block-fid
$7F4E85B887C8 block-position
$5594FF160570
$7F4E85B88998 save-buffer
$0
$20
