diff --git a/crates/app/src/config/config_file.rs b/crates/app/src/config/config_file.rs
index a0c4db1..a8ba835 100644
--- a/crates/app/src/config/config_file.rs
+++ b/crates/app/src/config/config_file.rs
@@ -40,10 +40,13 @@ pub(super) fn find_config_file() -> Result<PathBuf, ConfigError> {
 
 impl Configs {
     pub fn read(p: PathBuf) -> Result<Self, ConfigError> {
-        match p.extension().map(|v| v.to_str().unwrap()) {
+        match p
+            .extension()
+            .map(|v| v.to_str().expect("config path to be UTF-8"))
+        {
             Some("ron") => Ok(serde_json::from_str(&fs::read_to_string(p)?)?),
             Some("json") => Ok(ron::from_str(&fs::read_to_string(p)?)?),
-            e => Err(ConfigError::UnknownExtension(e.map(|v| v.to_owned()))),
+            e => Err(ConfigError::UnknownExtension(e.map(str::to_string))),
         }
     }
 }
diff --git a/crates/app/src/error_reporting.rs b/crates/app/src/error_reporting.rs
index 33ffff6..bc4c44b 100644
--- a/crates/app/src/error_reporting.rs
+++ b/crates/app/src/error_reporting.rs
@@ -3,12 +3,12 @@ use std::process;
 use ron::error::Position;
 
 /// Report an `Error` from the `serde_json` crate
-pub fn report_serde_json_err(src: &str, err: serde_json::Error) -> ! {
+pub fn report_serde_json_err(src: &str, err: &serde_json::Error) -> ! {
     report_serde_err(src, err.line(), err.column(), err.to_string())
 }
 
 /// Report a `SpannedError` from the `ron` crate
-pub fn report_serde_ron_err(src: &str, err: ron::error::SpannedError) -> ! {
+pub fn report_serde_ron_err(src: &str, err: &ron::error::SpannedError) -> ! {
     let Position { line, col } = err.position;
     report_serde_err(src, line, col, err.to_string())
 }
@@ -23,8 +23,8 @@ fn report_serde_err(src: &str, line: usize, col: usize, msg: String) -> ! {
         .with_message(msg)
         .with_note("We'd like to give better errors, but serde errors are horrible to work with...")
         .finish()
-        .print(("test", Source::from(src)))
-        .unwrap();
+        .eprint(("test", Source::from(src)))
+        .expect("writing error to stderr failed");
     process::exit(1);
 }