DNM Don't filter path

Author: thomcc

plrustc/plrustc/src/main.rs

@@ -20,6 +20,7 @@ use rustc_session::parse::ParseSess;
 use rustc_session::EarlyErrorHandler;
 use rustc_span::source_map::FileLoader;
 use rustc_span::Symbol;
+use std::collections::HashMap;
 use std::path::Path;
 
 const PLRUSTC_USER_CRATE_NAME: &str = "PLRUSTC_USER_CRATE_NAME";
@@ -54,11 +55,11 @@ fn clear_env() {
         .map(|(name, _)| name)
         .filter(|name| {
             let name = name.to_string_lossy().to_lowercase();
-            !(name.starts_with("rust") || name.starts_with("plrust"))
+            !(name.starts_with("rust") || name.starts_with("plrust") || name.starts_with("cargo") || name == "path")
         })
         .collect::<Vec<_>>();
     for name in all_var_names {
-        std::env::set_var(name, "");
+        std::env::remove_var(name);
     }
 }