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BUG #4743: potential bug between int and uint

From: "MATSUDA, Daiki" <d(dot)matuda(at)gmail(dot)com>
To: pgsql-bugs(at)postgresql(dot)org
Subject: BUG #4743: potential bug between int and uint
Date: 2009-03-31 05:57:28
Message-ID: 200903310557.n2V5vSNh030035@wwwmaster.postgresql.org (view raw or flat)
Thread:
Lists: pgsql-bugs
The following bug has been logged online:

Bug reference:      4743
Logged by:          MATSUDA, Daiki
Email address:      d(dot)matuda(at)gmail(dot)com
PostgreSQL version: 8.3.6
Operating system:   Linux
Description:        potential bug between int and uint
Details: 

diff -uNrp ./src/backend/storage/ipc/procarray.c.bk
./src/backend/storage/ipc/procarray.c
--- ./src/backend/storage/ipc/procarray.c.bk    2009-03-05
10:23:03.000000000 +0900
+++ ./src/backend/storage/ipc/procarray.c       2009-03-05
10:25:20.000000000 +0900
@@ -662,8 +662,8 @@ GetSnapshotData(Snapshot snapshot, bool 
        TransactionId xmax;
        TransactionId globalxmin;
        int                     index;
-       int                     count = 0;
-       int                     subcount = 0;
+       uint32          count = 0;
+       int32           subcount = 0;
 
        Assert(snapshot != NULL);
 
because uint32 xcnt and int32 subxcnt in Snapshot structure, same as struct
SnapshotData, is declared. and
    snapshot->xcnt = count;
    snapshot->subxcnt = subcount;
are written in GetSnapshotData() in procarray.c. It is a potential bug.

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Next:From: Heikki LinnakangasDate: 2009-03-31 08:37:58
Subject: Re: BUG #4742: wrong resultset instead of syntax error
Previous:From: Slava MoudryDate: 2009-03-31 00:34:49
Subject: BUG #4742: wrong resultset instead of syntax error

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