Native memory leak when save document repeatedly

 https://github.com/couchbase/couchbase-lite-net/issues/1196

CouchbaseLite/2.6.0 (.NET; UWP 10.0.18363.476; Dell Inc. XPS 15 9570) Build/129 LiteCore/2.6.0 (2193) Commit/e715812a

Library Version

2.6.0 (2193)

.NET Runtime

UWP 10.0.18363.476

Operating System / Device Details

Windows 10 Enterprise

Expected behavior

The reproduction project should run indefinitely without running out of memory.

Actual behavior

The native heap size climbs rapidly as the reproduction project continues to insert records. This can be seen when running the project in Visual Studio 2019 and observing the diagnostic tools.

Steps To Reproduce

Run the supplied reproduction project. The reproduction project does the following:
var directoryPath = Path.GetTempPath(); while (true) { // asynchronously insert a record into the database await Task.Run(() => { var timestamp = DateTime.UtcNow; // create the record to be stored var record = new Dictionary<string, object>() {

{ "Timestamp", timestamp.Ticks }

,

{ "Value", "test" }

}; var config = new DatabaseConfiguration()

{ Directory = Path.Combine(directoryPath) }

; // create the database using (var db = new Database(name: "MyDatabase", config)) { // convert the record to a mutable document and save it using (var document = new MutableDocument(timestamp.Ticks.ToString(), record))

{ db.Save(document); }

} }).ConfigureAwait(false); // wait briefly before inserting another record await Task.Delay(10).ConfigureAwait(false); }