diff --git a/src/packages/map_basic.rs b/src/packages/map_basic.rs
index 44009e8a..40e2cec0 100644
--- a/src/packages/map_basic.rs
+++ b/src/packages/map_basic.rs
@@ -12,12 +12,10 @@ use crate::stdlib::{
 };
 
 fn map_get_keys(map: &mut Map) -> Vec<Dynamic> {
-    map.iter()
-        .map(|(k, _)| k.to_string().into())
-        .collect::<Vec<_>>()
+    map.iter().map(|(k, _)| k.to_string().into()).collect()
 }
 fn map_get_values(map: &mut Map) -> Vec<Dynamic> {
-    map.iter().map(|(_, v)| v.clone()).collect::<Vec<_>>()
+    map.iter().map(|(_, v)| v.clone()).collect()
 }
 
 #[cfg(not(feature = "no_object"))]
diff --git a/src/packages/string_more.rs b/src/packages/string_more.rs
index 4edef10e..0144792e 100644
--- a/src/packages/string_more.rs
+++ b/src/packages/string_more.rs
@@ -37,7 +37,7 @@ fn sub_string(s: &mut String, start: INT, len: INT) -> String {
         len as usize
     };
 
-    chars[offset..][..len].into_iter().collect::<String>()
+    chars[offset..][..len].into_iter().collect()
 }
 fn crop_string(s: &mut String, start: INT, len: INT) {
     let offset = if s.is_empty() || len <= 0 {
diff --git a/src/packages/time_basic.rs b/src/packages/time_basic.rs
index cb0c5f8e..173c3e22 100644
--- a/src/packages/time_basic.rs
+++ b/src/packages/time_basic.rs
@@ -87,10 +87,10 @@ def_package!(crate:BasicTimePackage:"Basic timing utilities.", lib, {
                 #[cfg(not(feature = "unchecked"))]
                 {
                     if seconds > (MAX_INT as u64) {
-                        return Err(EvalAltResult::ErrorArithmetic(
+                        return Err(Box::new(EvalAltResult::ErrorArithmetic(
                             format!("Integer overflow for timestamp.elapsed(): {}", seconds),
                             Position::none(),
-                        ));
+                        )));
                     }
                 }
                 return Ok(seconds as INT);
diff --git a/tests/maps.rs b/tests/maps.rs
index 897f8430..64c5a4c2 100644
--- a/tests/maps.rs
+++ b/tests/maps.rs
@@ -143,6 +143,7 @@ fn test_map_return() -> Result<(), Box<EvalAltResult>> {
 }
 
 #[test]
+#[cfg(not(feature = "no_index"))]
 fn test_map_for() -> Result<(), Box<EvalAltResult>> {
     let engine = Engine::new();