add test for issue rust-lang#55587

Author: euclio

src/test/ui/issues/issue-55587.rs

@@ -0,0 +1,5 @@
+use std::path::Path;
+
+fn main() {
+    let Path::new(); //~ ERROR expected tuple struct/variant
+}

src/test/ui/issues/issue-55587.stderr

@@ -0,0 +1,9 @@
+error[E0164]: expected tuple struct/variant, found method `<Path>::new`
+  --> $DIR/issue-55587.rs:4:9
+   |
+LL |     let Path::new(); //~ ERROR expected tuple struct/variant
+   |         ^^^^^^^^^^^ not a tuple variant or struct
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0164`.