Re: Segmentation fault while COPY in 7.3

"Nicolai Tufar" <ntufar(at)apb(dot)com(dot)tr> writes:
> From: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
>> Ohhh ...
>>
>> Nicolai, are you running with a client encoding different from server
>> encoding?

> Got it!

Okay, the problem is a double free of memory in COPY OUT. I've applied
the following patch for 7.3.1. (A better fix would be for COPY OUT to
run in a local memory context that it could reset every so often, like
once per row, and then we could remove these risky retail pfree's entirely.
I plan to do that instead in development sources.)

regards, tom lane

*** src/backend/commands/copy.c.orig Fri Oct 18 20:25:36 2002
--- src/backend/commands/copy.c Sun Dec 1 12:28:24 2002
***************
*** 1470,1478 ****
char *string;
char c;
char delimc = delim[0];
-
bool same_encoding;
! char *string_start;
int mblen;
int i;

--- 1470,1477 ----
char *string;
char c;
char delimc = delim[0];
bool same_encoding;
! char *string_start = NULL;
int mblen;
int i;

***************
*** 1481,1492 ****
{
string = (char *) pg_server_to_client((unsigned char *) server_string,
strlen(server_string));
! string_start = string;
}
else
{
string = server_string;
- string_start = NULL;
}

for (; (c = *string) != '\0'; string += mblen)
--- 1480,1491 ----
{
string = (char *) pg_server_to_client((unsigned char *) server_string,
strlen(server_string));
! if (string != server_string)
! string_start = string;
}
else
{
string = server_string;
}

for (; (c = *string) != '\0'; string += mblen)