From 19b05d8f17d0f0b416dcac107c24f5d312ed7a02 Mon Sep 17 00:00:00 2001
From: rhysd <lin90162@yahoo.co.jp>
Date: Thu, 14 Jul 2022 14:57:39 +0900
Subject: [PATCH 1/2] capi: fix 'unused return value' warnings from `cargo
 check`

---
 regex-capi/src/rure.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/regex-capi/src/rure.rs b/regex-capi/src/rure.rs
index dc49b20a3..ec79fe410 100644
--- a/regex-capi/src/rure.rs
+++ b/regex-capi/src/rure.rs
@@ -257,8 +257,8 @@ ffi_fn! {
     fn rure_iter_capture_names_free(it: *mut IterCaptureNames) {
         unsafe {
             let it = &mut *it;
-            while let Some(ptr) = it.name_ptrs.pop(){
-                CString::from_raw(ptr);
+            while let Some(ptr) = it.name_ptrs.pop() {
+                drop(CString::from_raw(ptr));
             }
             Box::from_raw(it);
         }
@@ -624,6 +624,6 @@ fn rure_escape(
 
 ffi_fn! {
     fn rure_cstring_free(s: *mut c_char) {
-        unsafe { CString::from_raw(s); }
+        unsafe { drop(CString::from_raw(s)); }
     }
 }

From 1324f2d59a7977b606143ab4511026256adb7a24 Mon Sep 17 00:00:00 2001
From: rhysd <lin90162@yahoo.co.jp>
Date: Thu, 14 Jul 2022 22:20:47 +0900
Subject: [PATCH 2/2] capi: explicitly call `drop()` for calling `free()` via
 `Box`

---
 regex-capi/src/error.rs |  2 +-
 regex-capi/src/rure.rs  | 12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/regex-capi/src/error.rs b/regex-capi/src/error.rs
index 2ca3fae80..a269a3913 100644
--- a/regex-capi/src/error.rs
+++ b/regex-capi/src/error.rs
@@ -54,7 +54,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_error_free(err: *mut Error) {
-        unsafe { Box::from_raw(err); }
+        unsafe { drop(Box::from_raw(err)); }
     }
 }
 
diff --git a/regex-capi/src/rure.rs b/regex-capi/src/rure.rs
index ec79fe410..d2e1539ed 100644
--- a/regex-capi/src/rure.rs
+++ b/regex-capi/src/rure.rs
@@ -151,7 +151,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_free(re: *const Regex) {
-        unsafe { Box::from_raw(re as *mut Regex); }
+        unsafe { drop(Box::from_raw(re as *mut Regex)); }
     }
 }
 
@@ -260,7 +260,7 @@ ffi_fn! {
             while let Some(ptr) = it.name_ptrs.pop() {
                 drop(CString::from_raw(ptr));
             }
-            Box::from_raw(it);
+            drop(Box::from_raw(it));
         }
     }
 }
@@ -316,7 +316,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_iter_free(it: *mut Iter) {
-        unsafe { Box::from_raw(it); }
+        unsafe { drop(Box::from_raw(it)); }
     }
 }
 
@@ -407,7 +407,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_captures_free(captures: *const Captures) {
-        unsafe { Box::from_raw(captures as *mut Captures); }
+        unsafe { drop(Box::from_raw(captures as *mut Captures)); }
     }
 }
 
@@ -447,7 +447,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_options_free(options: *mut Options) {
-        unsafe { Box::from_raw(options); }
+        unsafe { drop(Box::from_raw(options)); }
     }
 }
 
@@ -527,7 +527,7 @@ ffi_fn! {
 
 ffi_fn! {
     fn rure_set_free(re: *const RegexSet) {
-        unsafe { Box::from_raw(re as *mut RegexSet); }
+        unsafe { drop(Box::from_raw(re as *mut RegexSet)); }
     }
 }