Two similar problems in the same file. Let me know if you want separate bug reports about these:

----------------

ext/date/lib/parse_tz.c:124]: Memory leak: buffer

if (!tz->type) {
  return;
}

----------------

ext/date/lib/parse_tz.c:152: Memory leak: leap_buffer

if (!tz->leap_times) {
  return;
}

I think something like this:

Index: ext/date/lib/parse_tz.c
===================================================================
RCS file: /repository/php-src/ext/date/lib/parse_tz.c,v
retrieving revision 1.20.2.6.2.13.2.4
diff -u -p -r1.20.2.6.2.13.2.4 parse_tz.c
--- ext/date/lib/parse_tz.c	9 Aug 2008 22:01:08 -0000	1.20.2.6.2.13.2.4
+++ ext/date/lib/parse_tz.c	26 Dec 2008 21:47:20 -0000
@@ -100,6 +100,7 @@ static void read_transistions(char **tzf
 
 		cbuffer = (unsigned char*) malloc(tz->timecnt * sizeof(unsigned char));
 		if (!cbuffer) {
+			free(buffer);
 			return;
 		}
 		memcpy(cbuffer, *tzf, sizeof(unsigned char) * tz->timecnt);
@@ -125,6 +126,7 @@ static void read_types(char **tzf, timel
 
 	tz->type = (ttinfo*) malloc(tz->typecnt * sizeof(struct ttinfo));
 	if (!tz->type) {
+		free(buffer);
 		return;
 	}
 
@@ -153,6 +155,9 @@ static void read_types(char **tzf, timel
 
 		tz->leap_times = (tlinfo*) malloc(tz->leapcnt * sizeof(tlinfo));
 		if (!tz->leap_times) {
+			free(leap_buffer);
+			free(tz->timezone_abbr);
+			free(tz->types);
 			return;
 		}
 		for (i = 0; i < tz->leapcnt; i++) {

Truly, I think that Derick really free that vars. in another place.

Is this still an issue? Or can that be closed after 8 years and targeting an unsupported version?

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.