error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:16:5
   |
LL | /     if !m.contains_key(&k) {
LL | |         m.insert(k, v);
LL | |     } else {
LL | |         m.insert(k, v2);
LL | |     }
   | |_____^
   |
   = note: `-D clippy::map-entry` implied by `-D warnings`
help: try this
   |
LL |     match m.entry(k) {
LL |         std::collections::hash_map::Entry::Vacant(e) => {
LL |             e.insert(v);
LL |         }
LL |         std::collections::hash_map::Entry::Occupied(mut e) => {
LL |             e.insert(v2);
 ...

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:22:5
   |
LL | /     if m.contains_key(&k) {
LL | |         m.insert(k, v);
LL | |     } else {
LL | |         m.insert(k, v2);
LL | |     }
   | |_____^
   |
help: try this
   |
LL |     match m.entry(k) {
LL |         std::collections::hash_map::Entry::Occupied(mut e) => {
LL |             e.insert(v);
LL |         }
LL |         std::collections::hash_map::Entry::Vacant(e) => {
LL |             e.insert(v2);
 ...

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:28:5
   |
LL | /     if !m.contains_key(&k) {
LL | |         m.insert(k, v);
LL | |     } else {
LL | |         foo();
LL | |     }
   | |_____^
   |
help: try this
   |
LL |     if let std::collections::hash_map::Entry::Vacant(e) = m.entry(k) {
LL |         e.insert(v);
LL |     } else {
LL |         foo();
LL |     }
   |

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:34:5
   |
LL | /     if !m.contains_key(&k) {
LL | |         foo();
LL | |     } else {
LL | |         m.insert(k, v);
LL | |     }
   | |_____^
   |
help: try this
   |
LL |     if let std::collections::hash_map::Entry::Occupied(mut e) = m.entry(k) {
LL |         e.insert(v);
LL |     } else {
LL |         foo();
LL |     }
   |

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:40:5
   |
LL | /     if !m.contains_key(&k) {
LL | |         m.insert(k, v);
LL | |     } else {
LL | |         m.insert(k, v2);
LL | |     }
   | |_____^
   |
help: try this
   |
LL |     match m.entry(k) {
LL |         std::collections::hash_map::Entry::Vacant(e) => {
LL |             e.insert(v);
LL |         }
LL |         std::collections::hash_map::Entry::Occupied(mut e) => {
LL |             e.insert(v2);
 ...

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:46:5
   |
LL | /     if m.contains_key(&k) {
LL | |         if true { m.insert(k, v) } else { m.insert(k, v2) }
LL | |     } else {
LL | |         m.insert(k, v)
LL | |     };
   | |_____^
   |
help: try this
   |
LL |     match m.entry(k) {
LL |         std::collections::hash_map::Entry::Occupied(mut e) => {
LL |             if true { Some(e.insert(v)) } else { Some(e.insert(v2)) }
LL |         }
LL |         std::collections::hash_map::Entry::Vacant(e) => {
LL |             e.insert(v);
 ...

error: usage of `contains_key` followed by `insert` on a `HashMap`
  --> $DIR/entry_with_else.rs:52:5
   |
LL | /     if m.contains_key(&k) {
LL | |         foo();
LL | |         m.insert(k, v)
LL | |     } else {
LL | |         None
LL | |     };
   | |_____^
   |
help: try this
   |
LL |     if let std::collections::hash_map::Entry::Occupied(mut e) = m.entry(k) {
LL |         foo();
LL |         Some(e.insert(v))
LL |     } else {
LL |         None
LL |     };
   |

error: aborting due to 7 previous errors