From 82494a33b03d3d93a5f42c9b633f7f9d37dff17f Mon Sep 17 00:00:00 2001
From: Ryan Fairfax <rfairfax@apple.com>
Date: Wed, 18 Sep 2024 09:53:40 -0700
Subject: [PATCH] fix(core): Support Rust 1.78

Add a qualifier to imports to support slightly older Rust versions.
Tag cargo metadata with min tested version to give a better error.
---
 core/src/rust/filodb_core/Cargo.toml                             | 1 +
 core/src/rust/tantivy_utils/Cargo.toml                           | 1 +
 .../tantivy_utils/src/collectors/part_key_record_collector.rs    | 1 +
 3 files changed, 3 insertions(+)

diff --git a/core/src/rust/filodb_core/Cargo.toml b/core/src/rust/filodb_core/Cargo.toml
index 7ca4847457..10f86f6c61 100644
--- a/core/src/rust/filodb_core/Cargo.toml
+++ b/core/src/rust/filodb_core/Cargo.toml
@@ -2,6 +2,7 @@
 name = "filodb_core"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.78"
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/core/src/rust/tantivy_utils/Cargo.toml b/core/src/rust/tantivy_utils/Cargo.toml
index f0ad238872..6491e78e98 100644
--- a/core/src/rust/tantivy_utils/Cargo.toml
+++ b/core/src/rust/tantivy_utils/Cargo.toml
@@ -2,6 +2,7 @@
 name = "tantivy_utils"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.78"
 
 [dependencies]
 hashbrown = "0.14.5"
diff --git a/core/src/rust/tantivy_utils/src/collectors/part_key_record_collector.rs b/core/src/rust/tantivy_utils/src/collectors/part_key_record_collector.rs
index a6e64c9cc6..65b1033190 100644
--- a/core/src/rust/tantivy_utils/src/collectors/part_key_record_collector.rs
+++ b/core/src/rust/tantivy_utils/src/collectors/part_key_record_collector.rs
@@ -1,6 +1,7 @@
 //! Collector for part key binary data
 
 use std::cmp::min;
+use std::mem::size_of;
 
 use crate::collectors::column_cache::ColumnCache;
 use crate::field_constants::{END_TIME, PART_KEY, START_TIME};