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From: bright@Data-IO.COM (Walter Bright)
Newsgroups: comp.lang.c++
Subject: Re: Zortech Problem: heap corrupted
Message-ID: <2605@dataio.Data-IO.COM>
Date: 2 Aug 90 00:26:53 GMT
References: <2353@laura.UUCP>
Organization: Data I/O Corporation; Redmond, WA
Lines: 18

In article <2353@laura.UUCP> bause@unido.uucp (Falko Bause) writes:
<A friend of mine is using Zortech 2.0. He uses hashed search tables and
<binary tree search tables. After some insertions into both tables he gets
<the error message:  heap corrupted.
<Is this is known error of Zortech's C++? 
<Please answer by e-mail to bause@unido.uucp

The "heap is corrupted" message is generated by the free() function under
the following conditions:
o	An odd pointer is passed to free().
o	A pointer is passed to free() that was not returned by malloc(),
	calloc() or realloc().
o	A pointer is free'd more than once.
o	A wild pointer has trashed the free list data structure.

A common source of this error in C++ programs is when the compiler generates
a default copy constructor, and the objects contain pointers to malloc'd
data. (It's not a compiler bug!)