clippy::let_underscore_drop

src/hooks.rs

@@ -473,10 +473,10 @@ impl InnerConnection {
         where
             F: FnMut(),
         {
-            let _ = catch_unwind(|| {
+            drop(catch_unwind(|| {
                 let boxed_hook: *mut F = p_arg as *mut F;
                 (*boxed_hook)();
-            });
+            }));
         }
 
         let free_rollback_hook = if hook.is_some() {
@@ -520,7 +520,7 @@ impl InnerConnection {
             F: FnMut(Action, &str, &str, i64),
         {
             let action = Action::from(action_code);
-            let _ = catch_unwind(|| {
+            drop(catch_unwind(|| {
                 let boxed_hook: *mut F = p_arg as *mut F;
                 (*boxed_hook)(
                     action,
@@ -528,7 +528,7 @@ impl InnerConnection {
                     expect_utf8(p_table_name, "table name"),
                     row_id,
                 );
-            });
+            }));
         }
 
         let free_update_hook = if hook.is_some() {

src/trace.rs

@@ -31,7 +31,7 @@ pub unsafe fn config_log(callback: Option<fn(c_int, &str)>) -> Result<()> {
         let callback: fn(c_int, &str) = unsafe { mem::transmute(p_arg) };
 
         let s = String::from_utf8_lossy(c_slice);
-        let _ = catch_unwind(|| callback(err, &s));
+        drop(catch_unwind(|| callback(err, &s)));
     }
 
     let rc = match callback {
@@ -75,7 +75,7 @@ impl Connection {
             let trace_fn: fn(&str) = mem::transmute(p_arg);
             let c_slice = CStr::from_ptr(z_sql).to_bytes();
             let s = String::from_utf8_lossy(c_slice);
-            let _ = catch_unwind(|| trace_fn(&s));
+            drop(catch_unwind(|| trace_fn(&s)));
         }
 
         let c = self.db.borrow_mut();
@@ -109,7 +109,7 @@ impl Connection {
                 nanoseconds / NANOS_PER_SEC,
                 (nanoseconds % NANOS_PER_SEC) as u32,
             );
-            let _ = catch_unwind(|| profile_fn(&s, duration));
+            drop(catch_unwind(|| profile_fn(&s, duration)));
         }
 
         let c = self.db.borrow_mut();

src/unlock_notify.rs

@@ -45,7 +45,7 @@ unsafe extern "C" fn unlock_notify_cb(ap_arg: *mut *mut c_void, n_arg: c_int) {
     use std::slice::from_raw_parts;
     let args = from_raw_parts(ap_arg as *const &UnlockNotification, n_arg as usize);
     for un in args {
-        let _ = catch_unwind(std::panic::AssertUnwindSafe(|| un.fired()));
+        drop(catch_unwind(std::panic::AssertUnwindSafe(|| un.fired())));
     }
 }
 

src/vtab/array.rs

@@ -44,7 +44,7 @@ use crate::{Connection, Result};
 pub(crate) const ARRAY_TYPE: *const c_char = b"rarray\0" as *const u8 as *const c_char;
 
 pub(crate) unsafe extern "C" fn free_array(p: *mut c_void) {
-    let _: Array = Rc::from_raw(p as *const Vec<Value>);
+    drop(Rc::from_raw(p as *const Vec<Value>));
 }
 
 /// Array parameter / pointer

src/vtab/mod.rs

@@ -919,7 +919,7 @@ where
     let vt = vtab as *mut T;
     match (*vt).destroy() {
         Ok(_) => {
-            let _: Box<T> = Box::from_raw(vt);
+            drop(Box::from_raw(vt));
             ffi::SQLITE_OK
         }
         Err(Error::SqliteFailure(err, s)) => {