ICU-20168 Fix memory leak in error path, add a free statement. (#175)

diff --git a/icu4c/source/common/uloc_tag.cpp b/icu4c/source/common/uloc_tag.cpp
index c718de712ccd017060dd046a8c8a26641aa12811..17af4f7cbf43c4ad396fb083a55f937661d00be3 100644 (file)
--- a/icu4c/source/common/uloc_tag.cpp
+++ b/icu4c/source/common/uloc_tag.cpp
@@ -1507,6 +1507,7 @@ _appendLDMLExtensionAsKeywords(const char* ldmlext, ExtensionListEntry** appendT
             attrBufIdx += (len + 1);
         } else {
             *status = U_ILLEGAL_ARGUMENT_ERROR;
+            uprv_free(attr);
             goto cleanup;
         }