diff --git a/Dockerfile-collab b/Dockerfile-collab
index 50af874200a..fbbcb0df048 100644
--- a/Dockerfile-collab
+++ b/Dockerfile-collab
@@ -1,6 +1,6 @@
 # syntax = docker/dockerfile:1.2
 
-FROM rust:1.93-bookworm as builder
+FROM rust:1.94-bookworm as builder
 WORKDIR app
 COPY . .
 
diff --git a/crates/dap/src/client.rs b/crates/dap/src/client.rs
index aa2e53f43cb..966445e4480 100644
--- a/crates/dap/src/client.rs
+++ b/crates/dap/src/client.rs
@@ -284,6 +284,7 @@ mod tests {
 
     #[gpui::test]
     pub async fn test_initialize_client(cx: &mut TestAppContext) {
+        #![expect(clippy::result_large_err)]
         init_test(cx);
 
         let client = DebugAdapterClient::start(
diff --git a/crates/debugger_ui/src/tests/attach_modal.rs b/crates/debugger_ui/src/tests/attach_modal.rs
index 4e8839f82f4..0b89b8c1339 100644
--- a/crates/debugger_ui/src/tests/attach_modal.rs
+++ b/crates/debugger_ui/src/tests/attach_modal.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     attach_modal::{Candidate, ModalIntent},
     tests::start_debug_session_with,
diff --git a/crates/debugger_ui/src/tests/console.rs b/crates/debugger_ui/src/tests/console.rs
index fad483b0f4a..9e672be080a 100644
--- a/crates/debugger_ui/src/tests/console.rs
+++ b/crates/debugger_ui/src/tests/console.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     tests::{active_debug_session_panel, start_debug_session},
     *,
diff --git a/crates/debugger_ui/src/tests/dap_logger.rs b/crates/debugger_ui/src/tests/dap_logger.rs
index ff2b0f695f6..3b40e27aa43 100644
--- a/crates/debugger_ui/src/tests/dap_logger.rs
+++ b/crates/debugger_ui/src/tests/dap_logger.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::tests::{init_test, init_test_workspace, start_debug_session};
 use dap::requests::{StackTrace, Threads};
 use debugger_tools::LogStore;
diff --git a/crates/debugger_ui/src/tests/debugger_panel.rs b/crates/debugger_ui/src/tests/debugger_panel.rs
index e4c258a8d2a..223ed13142d 100644
--- a/crates/debugger_ui/src/tests/debugger_panel.rs
+++ b/crates/debugger_ui/src/tests/debugger_panel.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     persistence::DebuggerPaneItem,
     tests::{start_debug_session, start_debug_session_with},
diff --git a/crates/debugger_ui/src/tests/inline_values.rs b/crates/debugger_ui/src/tests/inline_values.rs
index 3ca29f7cc3e..c82276d8243 100644
--- a/crates/debugger_ui/src/tests/inline_values.rs
+++ b/crates/debugger_ui/src/tests/inline_values.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::{path::Path, sync::Arc};
 
 use dap::{Scope, StackFrame, Variable, requests::Variables};
diff --git a/crates/debugger_ui/src/tests/module_list.rs b/crates/debugger_ui/src/tests/module_list.rs
index 09c90cbc4a3..21b5ec67c20 100644
--- a/crates/debugger_ui/src/tests/module_list.rs
+++ b/crates/debugger_ui/src/tests/module_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     debugger_panel::DebugPanel,
     persistence::DebuggerPaneItem,
diff --git a/crates/debugger_ui/src/tests/new_process_modal.rs b/crates/debugger_ui/src/tests/new_process_modal.rs
index 54c38d8b1ce..01e83b533eb 100644
--- a/crates/debugger_ui/src/tests/new_process_modal.rs
+++ b/crates/debugger_ui/src/tests/new_process_modal.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use dap::DapRegistry;
 use editor::Editor;
 use gpui::{BackgroundExecutor, TestAppContext, VisualTestContext};
diff --git a/crates/debugger_ui/src/tests/persistence.rs b/crates/debugger_ui/src/tests/persistence.rs
index f5fb4f0ab2d..ca04828c40b 100644
--- a/crates/debugger_ui/src/tests/persistence.rs
+++ b/crates/debugger_ui/src/tests/persistence.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::iter::zip;
 
 use crate::{
diff --git a/crates/debugger_ui/src/tests/stack_frame_list.rs b/crates/debugger_ui/src/tests/stack_frame_list.rs
index 7e1763f6650..dd1ddcdf7a1 100644
--- a/crates/debugger_ui/src/tests/stack_frame_list.rs
+++ b/crates/debugger_ui/src/tests/stack_frame_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     debugger_panel::DebugPanel,
     session::running::stack_frame_list::{
diff --git a/crates/debugger_ui/src/tests/variable_list.rs b/crates/debugger_ui/src/tests/variable_list.rs
index 4cfdae093f6..8e6c1259921 100644
--- a/crates/debugger_ui/src/tests/variable_list.rs
+++ b/crates/debugger_ui/src/tests/variable_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::sync::{
     Arc,
     atomic::{AtomicBool, Ordering},
diff --git a/crates/eval_cli/Dockerfile b/crates/eval_cli/Dockerfile
index f733ca42cbe..c0ce40f6032 100644
--- a/crates/eval_cli/Dockerfile
+++ b/crates/eval_cli/Dockerfile
@@ -7,12 +7,12 @@
 # Or use the helper script:
 #   crates/eval_cli/script/build-linux
 
-FROM rust:1.93 AS builder
+FROM rust:1.94.1 AS builder
 
 WORKDIR /app
 
     # Pre-install the toolchain specified in rust-toolchain.toml so it is cached.
-RUN rustup toolchain install 1.93 --profile minimal \
+RUN rustup toolchain install 1.94.1 --profile minimal \
     --component rustfmt --component clippy --component rust-analyzer --component rust-src \
     --target wasm32-wasip2 --target wasm32-unknown-unknown --target x86_64-unknown-linux-musl --target x86_64-unknown-linux-gnu
 
diff --git a/crates/project/src/debugger/test.rs b/crates/project/src/debugger/test.rs
index 53b88323e63..7ccbafa0e55 100644
--- a/crates/project/src/debugger/test.rs
+++ b/crates/project/src/debugger/test.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::{path::Path, sync::Arc};
 
 use dap::client::DebugAdapterClient;
diff --git a/crates/rpc/src/message_stream.rs b/crates/rpc/src/message_stream.rs
index 023e916df31..34888d98147 100644
--- a/crates/rpc/src/message_stream.rs
+++ b/crates/rpc/src/message_stream.rs
@@ -7,7 +7,6 @@ use futures::{SinkExt as _, StreamExt as _};
 use proto::Message as _;
 use std::time::Instant;
 use std::{fmt::Debug, io};
-use zstd::zstd_safe::WriteBuf;
 
 const KIB: usize = 1024;
 const MIB: usize = KIB * 1024;
@@ -87,7 +86,10 @@ where
             let received_at = Instant::now();
             match bytes? {
                 WebSocketMessage::Binary(bytes) => {
-                    zstd::stream::copy_decode(bytes.as_slice(), &mut self.encoding_buffer)?;
+                    zstd::stream::copy_decode(
+                        zstd::zstd_safe::WriteBuf::as_slice(&*bytes),
+                        &mut self.encoding_buffer,
+                    )?;
                     let envelope = Envelope::decode(self.encoding_buffer.as_slice())
                         .map_err(io::Error::from)?;
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 89b3c648ca2..15b4a8f0fc9 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,5 +1,5 @@
 [toolchain]
-channel = "1.93"
+channel = "1.94.1"
 profile = "minimal"
 components = [ "rustfmt", "clippy", "rust-analyzer", "rust-src" ]
 targets = [