error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:7:20
   |
LL |           Ok(val) => match val {
   |  ____________________^
LL | |             Some(n) => foo(n),
LL | |             _ => return,
LL | |         },
   | |_________^
   |
   = note: `-D clippy::collapsible-match` implied by `-D warnings`
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:7:12
   |
LL |         Ok(val) => match val {
   |            ^^^ Replace this binding
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:16:20
   |
LL |           Ok(val) => match val {
   |  ____________________^
LL | |             Some(n) => foo(n),
LL | |             _ => return,
LL | |         },
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:16:12
   |
LL |         Ok(val) => match val {
   |            ^^^ Replace this binding
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:25:9
   |
LL | /         if let Some(n) = val {
LL | |             take(n);
LL | |         }
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:24:15
   |
LL |     if let Ok(val) = res_opt {
   |               ^^^ Replace this binding
LL |         if let Some(n) = val {
   |                ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:32:9
   |
LL | /         if let Some(n) = val {
LL | |             take(n);
LL | |         } else {
LL | |             return;
LL | |         }
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:31:15
   |
LL |     if let Ok(val) = res_opt {
   |               ^^^ Replace this binding
LL |         if let Some(n) = val {
   |                ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:43:9
   |
LL | /         match val {
LL | |             Some(n) => foo(n),
LL | |             _ => (),
LL | |         }
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:42:15
   |
LL |     if let Ok(val) = res_opt {
   |               ^^^ Replace this binding
LL |         match val {
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:52:13
   |
LL | /             if let Some(n) = val {
LL | |                 take(n);
LL | |             }
   | |_____________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:51:12
   |
LL |         Ok(val) => {
   |            ^^^ Replace this binding
LL |             if let Some(n) = val {
   |                    ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:61:9
   |
LL | /         match val {
LL | |             Some(n) => foo(n),
LL | |             _ => return,
LL | |         }
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:60:15
   |
LL |     if let Ok(val) = res_opt {
   |               ^^^ Replace this binding
LL |         match val {
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:72:13
   |
LL | /             if let Some(n) = val {
LL | |                 take(n);
LL | |             } else {
LL | |                 return;
LL | |             }
   | |_____________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:71:12
   |
LL |         Ok(val) => {
   |            ^^^ Replace this binding
LL |             if let Some(n) = val {
   |                    ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:83:20
   |
LL |           Ok(val) => match val {
   |  ____________________^
LL | |             Some(n) => foo(n),
LL | |             None => return,
LL | |         },
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:83:12
   |
LL |         Ok(val) => match val {
   |            ^^^ Replace this binding
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: Unnecessary nested match
  --> $DIR/collapsible_match.rs:92:22
   |
LL |           Some(val) => match val {
   |  ______________________^
LL | |             Some(n) => foo(n),
LL | |             _ => return,
LL | |         },
   | |_________^
   |
help: The outer pattern can be modified to include the inner pattern.
  --> $DIR/collapsible_match.rs:92:14
   |
LL |         Some(val) => match val {
   |              ^^^ Replace this binding
LL |             Some(n) => foo(n),
   |             ^^^^^^^ with this pattern

error: aborting due to 10 previous errors