Rollup merge of #64007 - estebank:overlapping-patterns, r=matthewjasper

Add check for overlapping ranges to unreachable patterns lint

Fix #63987.

1 files changed, 24 insertions, 10 deletions

diff --git a/src/test/ui/exhaustive_integer_patterns.stderr b/src/test/ui/exhaustive_integer_patterns.stderr
index 6c4b7b0cc03..7a3a36a820c 100644
--- a/src/test/ui/exhaustive_integer_patterns.stderr
+++ b/src/test/ui/exhaustive_integer_patterns.stderr
@@ -5,7 +5,7 @@ LL |         200 => {}
    |         ^^^
    |
 note: lint level defined here
-  --> $DIR/exhaustive_integer_patterns.rs:4:9
+  --> $DIR/exhaustive_integer_patterns.rs:3:9
    |
 LL | #![deny(unreachable_patterns)]
    |         ^^^^^^^^^^^^^^^^^^^^
@@ -41,7 +41,7 @@ LL |     match x {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `std::i8::MIN` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:82:11
+  --> $DIR/exhaustive_integer_patterns.rs:83:11
    |
 LL |     match 0i8 {
    |           ^^^ pattern `std::i8::MIN` not covered
@@ -49,7 +49,7 @@ LL |     match 0i8 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `0i16` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:90:11
+  --> $DIR/exhaustive_integer_patterns.rs:91:11
    |
 LL |     match 0i16 {
    |           ^^^^ pattern `0i16` not covered
@@ -57,7 +57,7 @@ LL |     match 0i16 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `128u8..=std::u8::MAX` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:108:11
+  --> $DIR/exhaustive_integer_patterns.rs:109:11
    |
 LL |     match 0u8 {
    |           ^^^ pattern `128u8..=std::u8::MAX` not covered
@@ -65,7 +65,7 @@ LL |     match 0u8 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `(0u8, Some(_))` and `(2u8..=std::u8::MAX, Some(_))` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:120:11
+  --> $DIR/exhaustive_integer_patterns.rs:121:11
    |
 LL |     match (0u8, Some(())) {
    |           ^^^^^^^^^^^^^^^ patterns `(0u8, Some(_))` and `(2u8..=std::u8::MAX, Some(_))` not covered
@@ -73,15 +73,29 @@ LL |     match (0u8, Some(())) {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `(126u8..=127u8, false)` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:125:11
+  --> $DIR/exhaustive_integer_patterns.rs:126:11
    |
 LL |     match (0u8, true) {
    |           ^^^^^^^^^^^ pattern `(126u8..=127u8, false)` not covered
    |
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
+error: multiple patterns covering the same range
+  --> $DIR/exhaustive_integer_patterns.rs:141:9
+   |
+LL |         0 .. 2 => {}
+   |         ------ this range overlaps on `1u8`
+LL |         1 ..= 2 => {}
+   |         ^^^^^^^ overlapping patterns
+   |
+note: lint level defined here
+  --> $DIR/exhaustive_integer_patterns.rs:4:9
+   |
+LL | #![deny(overlapping_patterns)]
+   |         ^^^^^^^^^^^^^^^^^^^^
+
 error[E0004]: non-exhaustive patterns: `std::u128::MAX` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:145:11
+  --> $DIR/exhaustive_integer_patterns.rs:146:11
    |
 LL |     match 0u128 {
    |           ^^^^^ pattern `std::u128::MAX` not covered
@@ -89,7 +103,7 @@ LL |     match 0u128 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `5u128..=std::u128::MAX` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:149:11
+  --> $DIR/exhaustive_integer_patterns.rs:150:11
    |
 LL |     match 0u128 {
    |           ^^^^^ pattern `5u128..=std::u128::MAX` not covered
@@ -97,13 +111,13 @@ LL |     match 0u128 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `0u128..=3u128` not covered
-  --> $DIR/exhaustive_integer_patterns.rs:153:11
+  --> $DIR/exhaustive_integer_patterns.rs:154:11
    |
 LL |     match 0u128 {
    |           ^^^^^ pattern `0u128..=3u128` not covered
    |
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
-error: aborting due to 13 previous errors
+error: aborting due to 14 previous errors
 
 For more information about this error, try `rustc --explain E0004`.