diff --git a/core/src/util/disk_collections.rs b/core/src/util/disk_collections.rs
index fb842427b..d1669e0ec 100644
--- a/core/src/util/disk_collections.rs
+++ b/core/src/util/disk_collections.rs
@@ -324,6 +324,7 @@ where
             .write(true)
             .read(true)
             .create(true)
+            .truncate(true)
             .open(location)?;
         let mut builder = TableBuilder::new(custom_options(self.block_cache_capacity), out_file);
         for entry in self.iter()? {
diff --git a/graphannis/src/annis/db/corpusstorage.rs b/graphannis/src/annis/db/corpusstorage.rs
index a9603f9e2..318aaed90 100644
--- a/graphannis/src/annis/db/corpusstorage.rs
+++ b/graphannis/src/annis/db/corpusstorage.rs
@@ -2633,6 +2633,7 @@ fn create_lockfile_for_directory(db_dir: &Path) -> Result<File> {
         .read(true)
         .write(true)
         .create(true)
+        .truncate(true)
         .open(lock_file_path.as_path())
         .map_err(|e| CorpusStorageError::LockCorpusDirectory {
             path: db_dir.to_string_lossy().to_string(),
diff --git a/graphannis/src/annis/util/quicksort.rs b/graphannis/src/annis/util/quicksort.rs
index b346f9bb4..eb54a736e 100644
--- a/graphannis/src/annis/util/quicksort.rs
+++ b/graphannis/src/annis/util/quicksort.rs
@@ -119,7 +119,7 @@ where
         let v2 = (i2, items.try_get(i2)?.into_owned());
         let v3 = (i3, items.try_get(i3)?.into_owned());
 
-        let mut v = vec![v1, v2, v3];
+        let mut v = [v1, v2, v3];
         // Adapted median creation using swaps from
         // https://en.wikipedia.org/wiki/Quicksort#Choice_of_pivot
         let low = 0;