WIP filter out non-utf8 env key/values

src/env.rs

@@ -1,4 +1,5 @@
 use std::env;
+use std::ffi::OsString;
 
 #[cfg(feature = "convert-case")]
 use convert_case::{Case, Casing};
@@ -243,6 +244,21 @@ impl Source for Environment {
             .as_ref()
             .map(|prefix| format!("{prefix}{prefix_separator}").to_lowercase());
 
+        let filter_utf8 = |(key, value): (OsString, OsString)| {
+            let key = if let Ok(key) = key.into_string() {
+                key
+            } else {
+                return None;
+            };
+            let value = if let Ok(value) = value.into_string() {
+                value
+            } else {
+                return None;
+            };
+
+            Some((key, value))
+        };
+
         let collector = |(key, value): (String, String)| {
             // Treat empty environment variables as unset
             if self.ignore_empty && value.is_empty() {
@@ -312,7 +328,7 @@ impl Source for Environment {
 
         match &self.source {
             Some(source) => source.clone().into_iter().for_each(collector),
-            None => env::vars().for_each(collector),
+            None => env::vars_os().filter_map(filter_utf8).for_each(collector),
         }
 
         Ok(m)