ICU-11706 Fix memory leak when DateIntervalFormat::setDateIntervalInfo is called

X-SVN-Rev: 37620

diff --git a/icu4c/source/i18n/dtitvfmt.cpp b/icu4c/source/i18n/dtitvfmt.cpp
index 1c2ab68c2e23ce294bf0ebf0d85f380c75e3f634..e0601f08d83ea0c786079c5504fbd861be3a5662 100644 (file)
--- a/icu4c/source/i18n/dtitvfmt.cpp
+++ b/icu4c/source/i18n/dtitvfmt.cpp
@@ -435,6 +435,15 @@ DateIntervalFormat::setDateIntervalInfo(const DateIntervalInfo& newItvPattern,
                                         UErrorCode& status) {
     delete fInfo;
     fInfo = new DateIntervalInfo(newItvPattern);
+
+    // Delete patterns that get reset by initializePattern
+    delete fDatePattern;
+    fDatePattern = NULL;
+    delete fTimePattern;
+    fTimePattern = NULL;
+    delete fDateTimeFormat;
+    fDateTimeFormat = NULL;
+
     if ( fDateFormat ) {
         initializePattern(status);
     }