Here is a patch for tzfile.5 to implement this change and a spelling correction:

--- tzfile.5.org        2007-08-20 07:47:41.000000000 -0700
+++ tzfile.5    2007-11-29 17:40:34.925076000 -0800
@@ -57,7 +57,9 @@
 described in the file is associated with the same-indexed transition time.
 These values serve as indices into an array of
 .I ttinfo
-structures that appears next in the file;
+structures (with
+.I tzh_typecnt
+entries) that appears next in the file;
 these structures are defined as follows:
 .in +.5i
 .sp
@@ -138,7 +140,7 @@
 the above header and data is followed by a second header and data,
 identical in format except that
 eight bytes are used for each transition time or leap second time.
-After the second header and data comes a newline-encloded,
+After the second header and data comes a newline-enclosed,
 POSIX-TZ-environment-variable-style string for use in handling instants
 after the last transition time stored in the file
 (with nothing between the newlines if there is no POSIX representation for

The attachment (523 bytes) is just in case the patch above is scrambled.


On Nov 25, 2007 7:09 PM, Jonathan Leffler <jonathan.leffler@gmail.com> wrote:
Part way through the description of the file structure, the document says:

These values serve as indices into an array of ttinfo
structures that appears next in the file; these structures
are defined as follows:

It isn't immediately clear that there are tzh_typecnt entries in the array of ttinfo structures.

Maybe the modification is as simple as:

These values serve as indices into an array of ttinfo
structures (with tzh_typecnt entries) that appears next in the file; these structures
are defined as follows:

--
Jonathan Leffler < jonathan.leffler@gmail.com>  #include <disclaimer.h>
Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org
"Blessed are we who can laugh at ourselves, for we shall never cease to be amused."



--
Jonathan Leffler <jonathan.leffler@gmail.com>  #include <disclaimer.h>
Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org
"Blessed are we who can laugh at ourselves, for we shall never cease to be amused."