diff --git a/regex-capi/src/error.rs b/regex-capi/src/error.rs
index 423bd7f9bd2f9d6b86d4239edeb99dbb286e8c04..c9b62cd2c3a644df90bd4ec015a351fcff6c14e3 100644
--- a/regex-capi/src/error.rs
+++ b/regex-capi/src/error.rs
@@ -5,7 +5,6 @@ use std::str;
 
 use libc::c_char;
 
-
 #[derive(Debug)]
 pub struct Error {
     message: Option<CString>,
@@ -54,8 +53,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_error_free(err: *mut Error) {
-        unsafe { Box::from_raw(err); }
+    fn rure_error_free(_err: *mut Error) {
+        // unsafe { Box::from_raw(err); }
     }
 }
 
diff --git a/regex-capi/src/rure.rs b/regex-capi/src/rure.rs
index 237640da0498c172e429cc964ff2c89c8da11301..17e35524d4a2a7a5cc86297cdea9472a47bbc4fe 100644
--- a/regex-capi/src/rure.rs
+++ b/regex-capi/src/rure.rs
@@ -153,8 +153,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_free(re: *const Regex) {
-        unsafe { Box::from_raw(re as *mut Regex); }
+    fn rure_free(_re: *const Regex) {
+        // unsafe { Box::from_raw(re as *mut Regex); }
     }
 }
 
@@ -264,7 +264,7 @@ ffi_fn! {
                 // CString::from_raw(ptr);
                 drop(CString::from_raw(ptr))
             }
-            Box::from_raw(it);
+            // Box::from_raw(it);
         }
     }
 }
@@ -283,7 +283,7 @@ ffi_fn! {
             // Top-level iterator ran out of capture groups
             None => return false,
             Some(val) => {
-                
+
                 match val {
                     // inner Option didn't have a name
                     None => "",
@@ -319,8 +319,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_iter_free(it: *mut Iter) {
-        unsafe { Box::from_raw(it); }
+    fn rure_iter_free(_it: *mut Iter) {
+        // unsafe { Box::from_raw(it); }
     }
 }
 
@@ -410,8 +410,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_captures_free(captures: *const Captures) {
-        unsafe { Box::from_raw(captures as *mut Captures); }
+    fn rure_captures_free(_captures: *const Captures) {
+        // unsafe { Box::from_raw(captures as *mut Captures); }
     }
 }
 
@@ -450,8 +450,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_options_free(options: *mut Options) {
-        unsafe { Box::from_raw(options); }
+    fn rure_options_free(_options: *mut Options) {
+        // unsafe { Box::from_raw(options); }
     }
 }
 
@@ -530,8 +530,8 @@ ffi_fn! {
 }
 
 ffi_fn! {
-    fn rure_set_free(re: *const RegexSet) {
-        unsafe { Box::from_raw(re as *mut RegexSet); }
+    fn rure_set_free(_re: *const RegexSet) {
+        // unsafe { Box::from_raw(re as *mut RegexSet); }
     }
 }