From e74b16b3a2d3404e60d3c89788f35a4667f12156 Mon Sep 17 00:00:00 2001
From: trinity-1686a <trinity@quickwit.io>
Date: Sat, 25 Feb 2023 15:02:51 +0100
Subject: [PATCH] make vecdeque contiguous before shrinking it

---
 src/mem/queue.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mem/queue.rs b/src/mem/queue.rs
index a954726..410efb2 100644
--- a/src/mem/queue.rs
+++ b/src/mem/queue.rs
@@ -27,9 +27,13 @@ impl RollingBuffer {
     }
 
     fn drain_start(&mut self, pos: usize) {
-        let before_len = self.len();
+        let target_len = self.len() * 9 / 8;
         self.buffer.drain(..pos);
-        self.buffer.shrink_to(before_len * 9 / 8);
+        // TODO this is a workarround for https://github.com/rust-lang/rust/issues/108453
+        if self.buffer.capacity() > target_len {
+            self.buffer.make_contiguous();
+            self.buffer.shrink_to(target_len);
+        }
     }
 
     fn extend(&mut self, slice: &[u8]) {