1 files changed, 100 insertions, 0 deletions
diff --git a/src/test/ui/parser/require-parens-for-chained-comparison.stderr b/src/test/ui/parser/require-parens-for-chained-comparison.stderr
new file mode 100644
index 000000000..0bf52854e
--- /dev/null
+++ b/src/test/ui/parser/require-parens-for-chained-comparison.stderr
@@ -0,0 +1,100 @@
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:2:11
+   |
+LL |     false == false == false;
+   |           ^^       ^^
+   |
+help: split the comparison into two
+   |
+LL |     false == false && false == false;
+   |                    ++++++++
+
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:6:11
+   |
+LL |     false == 0 < 2;
+   |           ^^   ^
+   |
+help: parenthesize the comparison
+   |
+LL |     false == (0 < 2);
+   |              +     +
+
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:10:6
+   |
+LL |     f<X>();
+   |      ^ ^
+   |
+help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   |
+LL |     f::<X>();
+   |      ++
+
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:14:6
+   |
+LL |     f<Result<Option<X>, Option<Option<X>>>(1, 2);
+   |      ^      ^
+   |
+help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   |
+LL |     f::<Result<Option<X>, Option<Option<X>>>(1, 2);
+   |      ++
+
+error: expected one of `!`, `.`, `::`, `;`, `?`, `else`, `{`, or an operator, found `,`
+  --> $DIR/require-parens-for-chained-comparison.rs:18:17
+   |
+LL |     let _ = f<u8, i8>();
+   |                 ^ expected one of 8 possible tokens
+   |
+help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   |
+LL |     let _ = f::<u8, i8>();
+   |              ++
+
+error: expected `while`, `for`, `loop` or `{` after a label
+  --> $DIR/require-parens-for-chained-comparison.rs:22:17
+   |
+LL |     let _ = f<'_, i8>();
+   |                 ^ expected `while`, `for`, `loop` or `{` after a label
+
+error: expected one of `.`, `:`, `;`, `?`, `else`, `for`, `loop`, `while`, or an operator, found `,`
+  --> $DIR/require-parens-for-chained-comparison.rs:22:17
+   |
+LL |     let _ = f<'_, i8>();
+   |                 ^ expected one of 9 possible tokens
+   |
+help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   |
+LL |     let _ = f::<'_, i8>();
+   |              ++
+
+error: expected `while`, `for`, `loop` or `{` after a label
+  --> $DIR/require-parens-for-chained-comparison.rs:27:9
+   |
+LL |     f<'_>();
+   |         ^ expected `while`, `for`, `loop` or `{` after a label
+
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:27:6
+   |
+LL |     f<'_>();
+   |      ^  ^
+   |
+help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   |
+LL |     f::<'_>();
+   |      ++
+
+error: comparison operators cannot be chained
+  --> $DIR/require-parens-for-chained-comparison.rs:32:14
+   |
+LL |     let _ = f<u8>;
+   |              ^  ^
+   |
+   = help: use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments
+   = help: or use `(...)` if you meant to specify fn arguments
+
+error: aborting due to 10 previous errors
+