4 files changed, 8 insertions, 20 deletions

diff --git a/crates/ra_db/src/fixture.rs b/crates/ra_db/src/fixture.rs
index 209713987..2aafb9965 100644
--- a/crates/ra_db/src/fixture.rs
+++ b/crates/ra_db/src/fixture.rs
@@ -222,7 +222,7 @@ impl From<Fixture> for FileMeta {
                 .edition
                 .as_ref()
                 .map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap()),
-            env: Env::from(f.env.iter()),
+            env: f.env.into_iter().collect(),
         }
     }
 }
diff --git a/crates/ra_db/src/input.rs b/crates/ra_db/src/input.rs
index aaa492759..6f2e5cfc7 100644
--- a/crates/ra_db/src/input.rs
+++ b/crates/ra_db/src/input.rs
@@ -6,7 +6,7 @@
 //! actual IO. See `vfs` and `project_model` in the `rust-analyzer` crate for how
 //! actual IO is done and lowered to input.
 
-use std::{fmt, ops, str::FromStr, sync::Arc};
+use std::{fmt, iter::FromIterator, ops, str::FromStr, sync::Arc};
 
 use ra_cfg::CfgOptions;
 use ra_syntax::SmolStr;
@@ -298,18 +298,9 @@ impl fmt::Display for Edition {
     }
 }
 
-impl<'a, T> From<T> for Env
-where
-    T: Iterator<Item = (&'a String, &'a String)>,
-{
-    fn from(iter: T) -> Self {
-        let mut result = Self::default();
-
-        for (k, v) in iter {
-            result.entries.insert(k.to_owned(), v.to_owned());
-        }
-
-        result
+impl FromIterator<(String, String)> for Env {
+    fn from_iter<T: IntoIterator<Item = (String, String)>>(iter: T) -> Self {
+        Env { entries: FromIterator::from_iter(iter) }
     }
 }
 
diff --git a/crates/ra_ide/src/mock_analysis.rs b/crates/ra_ide/src/mock_analysis.rs
index b28054688..c7e0f4b58 100644
--- a/crates/ra_ide/src/mock_analysis.rs
+++ b/crates/ra_ide/src/mock_analysis.rs
@@ -2,7 +2,7 @@
 use std::sync::Arc;
 
 use ra_cfg::CfgOptions;
-use ra_db::{CrateName, Env, FileSet, SourceRoot, VfsPath};
+use ra_db::{CrateName, FileSet, SourceRoot, VfsPath};
 use test_utils::{
     extract_annotations, extract_range_or_offset, Fixture, RangeOrOffset, CURSOR_MARKER,
 };
@@ -110,7 +110,7 @@ impl MockAnalysis {
                 data.edition.and_then(|it| it.parse().ok()).unwrap_or(Edition::Edition2018);
 
             let file_id = FileId(i as u32 + 1);
-            let env = Env::from(data.env.iter());
+            let env = data.env.into_iter().collect();
             if path == "/lib.rs" || path == "/main.rs" {
                 root_crate = Some(crate_graph.add_crate_root(
                     file_id,
diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index 2bb156610..6da4d7928 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -258,10 +258,7 @@ impl ProjectWorkspace {
                         let file_path = &krate.root_module;
                         let file_id = load(&file_path)?;
 
-                        let mut env = Env::default();
-                        for (k, v) in &krate.env {
-                            env.set(k, v.clone());
-                        }
+                        let env = krate.env.clone().into_iter().collect();
                         let proc_macro = krate
                             .proc_macro_dylib_path
                             .clone()