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Crash with local variables and EXIT
From: |
David Kuehling |
Subject: |
Crash with local variables and EXIT |
Date: |
Sun, 01 Aug 2021 16:06:53 +0000 |
Hi,
I just stumbled over a peculiar Gforth crash bug involving use of local
variables and ?EXIT:
A condensed demonstration of the crash is this code:
--8<--
: test ( flag -- )
0 { var }
?EXIT
1 { var } ;
false test
--8<--
I believe my Gforth was built from Git rev be3d6a82e9da5f8d9a1 (May 16
2021). This happens for me:
--8<--
$ gforth ./crash.fs -e bye
crash.fs:4:8: warning: redefined var
/usr/local/share/gforth/0.7.9_20210513/kernel/main.fs:0:1: warning: original
location
in file included from *the terminal*:0:-94824890370799:
in file included from *the terminal*:-1:1:
crash.fs:6:7: error: Invalid memory address
false >>>test<<<
Backtrace:
crash.fs:3:4: 0 $7FF8B56AA130 ?br
--8<--
This only happens when re-using a local variable name and only when
having the ?EXIT in between.
cheers,
David
- Crash with local variables and EXIT,
David Kuehling <=