Source: https://unicode-org.atlassian.net/browse/ICU-22132?focusedCommentId=166752
Author: Sean Burke
License:
Fixes: https://bugzilla.mozilla.org/show_bug.cgi?id=1843007

diff --git a/icu4c/source/i18n/vtzone.cpp b/icu4c/source/i18n/vtzone.cpp
index 3035106701..5e738e11fa 100644
--- a/source/i18n/vtzone.cpp
+++ b/source/i18n/vtzone.cpp
@@ -1735,14 +1735,14 @@ VTimeZone::write(VTZWriter& writer, UErrorCode& status) const {
             }
         }
     } else {
-        UnicodeString icutzprop;
-        UVector customProps(nullptr, uhash_compareUnicodeString, status);
+        UVector customProps(uprv_deleteUObject, uhash_compareUnicodeString, status);
         if (olsonzid.length() > 0 && icutzver.length() > 0) {
-            icutzprop.append(olsonzid);
-            icutzprop.append(u'[');
-            icutzprop.append(icutzver);
-            icutzprop.append(u']');
-            customProps.addElement(&icutzprop, status);
+            LocalPointer<UnicodeString> icutzprop(new UnicodeString(ICU_TZINFO_PROP), status);
+            icutzprop->append(olsonzid);
+            icutzprop->append(u'[');
+            icutzprop->append(icutzver);
+            icutzprop->append(u']');
+            customProps.adoptElement(icutzprop.orphan(), status);
         }
         writeZone(writer, *tz, &customProps, status);
     }
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<tr><td><span title='2024-04-20 18:32:09 +0200'>2024-04-20</span></td><td><a href='/guix/commit/gnu/packages/maven-parent-pom.scm?id=597f7db28a0ef9eb21acf8340820237a368a6b15'>gnu: Add maven-parent-pom-37.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/maven-parent-pom.scm (maven-parent-pom-37): New variable.

Change-Id: I572eea2548006929577ba72dfe022ddb22373099
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2024-04-20 18:32:04 +0200'>2024-04-20</span></td><td><a href='/guix/commit/gnu/packages/maven-parent-pom.scm?id=5438e1a86a7e88ba2d014a48f37b4d8e6e355ca7'>gnu: Add apache-parent-pom-27.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/maven-parent-pom.scm (apache-parent-pom-27): New
  variable.

Change-Id: Ic8ad7747dfa32621532fd7449735bdcd6adefc1e
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2024-04-20 18:32:00 +0200'>2024-04-20</span></td><td><a href='/guix/commit/gnu/packages/maven-parent-pom.scm?id=eec5c0d524fe9ff62e6b42350677f2ddc9b1b151'>gnu: Add maven-parent-pom-39.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/maven-parent-pom.scm (maven-parent-pom-39): New variable.

Change-Id: I9a2b203a0d0b4d2fb59d02077df2d607f59d953f
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2024-04-20 18:31:55 +0200'>2024-04-20</span></td><td><a href='/guix/commit/gnu/packages/maven-parent-pom.scm?id=05b2cfdc621541b64a142edf403b2b6097af8807'>gnu: Add apache-parent-pom-29.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/maven-parent-pom.scm (apache-parent-pom-29): New
  variable.

Change-Id: Ia369e90b4e0c861729dabe8c331baab2b1efe7ce
</span></span></td><td>Julien Lepiller</td></tr>