Revert "build: increase MSRV to 1.81.0"

This reverts commit ffe6efe.

Author: link2xt

.github/workflows/ci.yml

@@ -103,9 +103,9 @@ jobs:
           - os: macos-latest
             rust: 1.83.0
 
-          # Minimum Supported Rust Version = 1.81.0
+          # Minimum Supported Rust Version = 1.77.0
           - os: ubuntu-latest
-            rust: 1.81.0
+            rust: 1.77.0
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

Cargo.toml

@@ -3,7 +3,7 @@ name = "deltachat"
 version = "1.152.0"
 edition = "2021"
 license = "MPL-2.0"
-rust-version = "1.81"
+rust-version = "1.77"
 repository = "https://github.com/deltachat/deltachat-core-rust"
 
 [profile.dev]

src/chat.rs

@@ -312,7 +312,7 @@ impl ChatId {
 
     /// Create a group or mailinglist raw database record with the given parameters.
     /// The function does not add SELF nor checks if the record already exists.
-    #[expect(clippy::too_many_arguments)]
+    #[allow(clippy::too_many_arguments)]
     pub(crate) async fn create_multiuser_record(
         context: &Context,
         chattype: Chattype,
@@ -4444,7 +4444,7 @@ pub(crate) async fn delete_and_reset_all_device_msgs(context: &Context) -> Resul
 ///
 /// For example, it can be a message showing that a member was added to a group.
 /// Doesn't fail if the chat doesn't exist.
-#[expect(clippy::too_many_arguments)]
+#[allow(clippy::too_many_arguments)]
 pub(crate) async fn add_info_msg_with_cmd(
     context: &Context,
     chat_id: ChatId,

src/contact.rs

@@ -805,6 +805,7 @@ impl Contact {
         }
 
         let mut name = sanitize_name(name);
+        #[allow(clippy::collapsible_if)]
         if origin <= Origin::OutgoingTo {
             // The user may accidentally have written to a "noreply" address with another MUA:
             if addr.contains("noreply")

src/imap.rs

@@ -1301,7 +1301,7 @@ impl Session {
     /// Returns the last UID fetched successfully and the info about each downloaded message.
     /// If the message is incorrect or there is a failure to write a message to the database,
     /// it is skipped and the error is logged.
-    #[expect(clippy::too_many_arguments)]
+    #[allow(clippy::too_many_arguments)]
     pub(crate) async fn fetch_many_msgs(
         &mut self,
         context: &Context,
@@ -2689,6 +2689,7 @@ mod tests {
         }
     }
 
+    #[allow(clippy::too_many_arguments)]
     async fn check_target_folder_combination(
         folder: &str,
         mvbox_move: bool,

src/mimefactory.rs

@@ -1047,6 +1047,7 @@ impl MimeFactory {
         part.body(text)
     }
 
+    #[allow(clippy::cognitive_complexity)]
     async fn render_message(
         &mut self,
         context: &Context,

src/mimeparser.rs

@@ -1279,7 +1279,7 @@ impl MimeMessage {
         Ok(self.parts.len() > old_part_count)
     }
 
-    #[expect(clippy::too_many_arguments)]
+    #[allow(clippy::too_many_arguments)]
     async fn do_add_single_file_part(
         &mut self,
         context: &Context,

src/param.rs

@@ -371,6 +371,7 @@ impl Params {
     /// Note that in the [ParamsFile::FsPath] case the blob can be
     /// created without copying if the path already refers to a valid
     /// blob.  If so a [BlobObject] will be returned.
+    #[allow(clippy::needless_lifetimes)]
     pub async fn get_blob<'a>(
         &self,
         key: Param,

src/pgp.rs

@@ -21,9 +21,11 @@ use tokio::runtime::Handle;
 use crate::constants::KeyGenType;
 use crate::key::{DcKey, Fingerprint};
 
+#[allow(missing_docs)]
 #[cfg(test)]
 pub(crate) const HEADER_AUTOCRYPT: &str = "autocrypt-prefer-encrypt";
 
+#[allow(missing_docs)]
 pub const HEADER_SETUPCODE: &str = "passphrase-begin";
 
 /// Preferred symmetric encryption algorithm.

src/quota.rs

@@ -187,7 +187,7 @@ mod tests {
         Ok(())
     }
 
-    #[expect(clippy::assertions_on_constants)]
+    #[allow(clippy::assertions_on_constants)]
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_quota_thresholds() -> anyhow::Result<()> {
         assert!(QUOTA_ALLCLEAR_PERCENTAGE > 50);