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-rw-r--r--crates/ra_hir_expand/src/builtin_macro.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crates/ra_hir_expand/src/builtin_macro.rs b/crates/ra_hir_expand/src/builtin_macro.rs
index 3da137f2e..493cda2c4 100644
--- a/crates/ra_hir_expand/src/builtin_macro.rs
+++ b/crates/ra_hir_expand/src/builtin_macro.rs
@@ -358,7 +358,7 @@ fn env_expand(
358 // However, we cannot use an empty string here, because for 358 // However, we cannot use an empty string here, because for
359 // `include!(concat!(env!("OUT_DIR"), "/foo.rs"))` will become 359 // `include!(concat!(env!("OUT_DIR"), "/foo.rs"))` will become
360 // `include!("foo.rs"), which might go to infinite loop 360 // `include!("foo.rs"), which might go to infinite loop
361 let s = get_env_inner(db, arg_id, &key).unwrap_or("__RA_UNIMPLEMENTATED__".to_string()); 361 let s = get_env_inner(db, arg_id, &key).unwrap_or_else(|| "__RA_UNIMPLEMENTATED__".to_string());
362 let expanded = quote! { #s }; 362 let expanded = quote! { #s };
363 363
364 Ok((expanded, FragmentKind::Expr)) 364 Ok((expanded, FragmentKind::Expr))