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Date: Sun, 8 May 2011 00:17:23 +0200
Message-ID: <BANLkTimCMEy1_EPe00dX7yhi-9EqDzKaMA@mail.gmail.com>
Subject: Re: SIGFPE crash
From: Mikael Magnusson <mikachu@gmail.com>
To: Jon Mayo <jon.mayo@gmail.com>
Cc: zsh workers <zsh-workers@zsh.org>
Content-Type: text/plain; charset=UTF-8

On 7 May 2011 23:56, Jon Mayo <jon.mayo@gmail.com> wrote:
> echo $[-9223372036854775808/-1]
>
> this causes zsh to exit immediately with an FPE. Does anyone have a
> patch to fix this?

diff --git a/Src/math.c b/Src/math.c
index 35b362d..3c08052 100644
--- a/Src/math.c
+++ b/Src/math.c
@@ -1053,8 +1053,12 @@ op(int what)
                    return;
                if (c.type == MN_FLOAT)
                    c.u.d = a.u.d / b.u.d;
-               else
-                   c.u.l = a.u.l / b.u.l;
+               else {
+                    if (a.u.l == LONG_MIN && b.u.l == -1)
+                        c.u.l = 0;
+                    else
+                       c.u.l = a.u.l / b.u.l;
+                }
                break;
            case MOD:
            case MODEQ:


Do we want to print a warning and/or use another value than 0 in this case?

-- 
Mikael Magnusson