Reduce the amount of explicit FatalError.raise()

Instead use dcx.abort_if_error() or guar.raise_fatal() instead. These
guarantee that an error actually happened previously and thus we don't
silently abort.

compiler/rustc_parse/src/parser/path.rs

@@ -597,8 +597,7 @@ impl<'a> Parser<'a> {
                 // When encountering severely malformed code where there are several levels of
                 // nested unclosed angle args (`f::<f::<f::<f::<...`), we avoid severe O(n^2)
                 // behavior by bailing out earlier (#117080).
-                e.emit();
-                rustc_errors::FatalError.raise();
+                e.emit().raise_fatal();
             }
             Err(e) if is_first_invocation && self.unmatched_angle_bracket_count > 0 => {
                 self.angle_bracket_nesting -= 1;