Bump MSRV to 1.84 (#12670)

## Summary

Closes https://github.com/astral-sh/uv/issues/12649.

crates/uv-python/src/discovery.rs

@@ -978,7 +978,7 @@ pub fn find_python_installations<'a>(
         PythonRequest::Version(version) => {
             if let Err(err) = version.check_supported() {
                 return Box::new(iter::once(Err(Error::InvalidVersionRequest(err))));
-            };
+            }
             Box::new({
                 debug!("Searching for {request} in {sources}");
                 python_interpreters(version, None, environments, preference, cache)
@@ -1004,7 +1004,7 @@ pub fn find_python_installations<'a>(
         PythonRequest::ImplementationVersion(implementation, version) => {
             if let Err(err) = version.check_supported() {
                 return Box::new(iter::once(Err(Error::InvalidVersionRequest(err))));
-            };
+            }
             Box::new({
                 debug!("Searching for {request} in {sources}");
                 python_interpreters(
@@ -1026,8 +1026,8 @@ pub fn find_python_installations<'a>(
             if let Some(version) = request.version() {
                 if let Err(err) = version.check_supported() {
                     return Box::new(iter::once(Err(Error::InvalidVersionRequest(err))));
-                };
-            };
+                }
+            }
             Box::new({
                 debug!("Searching for {request} in {sources}");
                 python_interpreters(

crates/uv-python/src/downloads.rs

@@ -555,7 +555,7 @@ impl ManagedPythonDownload {
             return Ok(DownloadResult::AlreadyAvailable(path));
         }
 
-        let filename = url.path_segments().unwrap().last().unwrap();
+        let filename = url.path_segments().unwrap().next_back().unwrap();
         let ext = SourceDistExtension::from_path(filename)
             .map_err(|err| Error::MissingExtension(url.to_string(), err))?;
         let (reader, size) = read_url(&url, client).await?;
@@ -593,7 +593,7 @@ impl ManagedPythonDownload {
                     .await
                     .map_err(|err| Error::ExtractError(filename.to_string(), err))?;
             }
-        };
+        }
 
         hasher.finish().await.map_err(Error::HashExhaustion)?;
 

crates/uv-python/src/environment.rs

@@ -177,7 +177,7 @@ impl PythonEnvironment {
                 }));
             }
             Err(err) => return Err(Error::Discovery(err.into())),
-        };
+        }
 
         if root.as_ref().is_file() {
             return Err(InvalidEnvironment {
@@ -211,7 +211,7 @@ impl PythonEnvironment {
                 kind: InvalidEnvironmentKind::MissingExecutable(executable.clone()),
             }
             .into());
-        };
+        }
 
         let interpreter = Interpreter::query(executable, cache)?;
 

crates/uv-python/src/lib.rs

@@ -162,7 +162,7 @@ mod tests {
             match self.search_path.as_mut() {
                 Some(paths) => paths.push(path),
                 None => self.search_path = Some(vec![path]),
-            };
+            }
         }
 
         /// Create a new directory and add it to the search path.

crates/uv-python/src/managed.rs

@@ -496,7 +496,7 @@ impl ManagedPythonInstallation {
                         err,
                     })
                 }
-            };
+            }
         }
 
         Ok(())

crates/uv-python/src/sysconfig/mod.rs

@@ -224,7 +224,7 @@ fn find_sysconfigdata(
         let metadata = entry.metadata()?;
         if metadata.is_symlink() {
             continue;
-        };
+        }
 
         if metadata.is_file() {
             return Ok(entry.path());

crates/uv-python/src/virtualenv.rs

@@ -111,7 +111,7 @@ pub(crate) fn conda_environment_from_env(kind: CondaEnvironmentKind) -> Option<P
 
     if kind != CondaEnvironmentKind::from_prefix_path(&path) {
         return None;
-    };
+    }
 
     Some(path)
 }

crates/uv-python/src/windows_registry.rs

@@ -243,7 +243,7 @@ pub fn remove_registry_entry<'a>(
                         .context("Failed to clear registry entries under HKCU:\\{python_entry}"),
                 ));
             }
-        };
+        }
     }
 }
 
@@ -284,6 +284,6 @@ pub fn remove_orphan_registry_entries(installations: &[ManagedPythonInstallation
         if let Err(err) = CURRENT_USER.remove_tree(&python_entry) {
             // TODO(konsti): We don't have an installation key here.
             warn_user_once!("Failed to remove orphan registry key HKCU:\\{python_entry}: {err}");
-        };
+        }
     }
 }