fix: also exclude 2 coloncolon in a row

Author: yue4u

crates/ide-completion/src/context.rs

@@ -581,9 +581,14 @@ impl<'a> CompletionContext<'a> {
                     return None;
                 }
 
-                // has 3 colon in a row
+                // has 3 colon or 2 coloncolon in a row
                 // special casing this as per discussion in https://github.com/rust-lang/rust-analyzer/pull/13611#discussion_r1031845205
-                if prev_token.prev_token().map(|t| t.kind() == T![:]).unwrap_or(false) {
+                // and https://github.com/rust-lang/rust-analyzer/pull/13611#discussion_r1032812751
+                if prev_token
+                    .prev_token()
+                    .map(|t| t.kind() == T![:] || t.kind() == T![::])
+                    .unwrap_or(false)
+                {
                     return None;
                 }
             }

crates/ide-completion/src/tests/special.rs

@@ -967,11 +967,17 @@ fn foo { crate:$0 }
 }
 
 #[test]
-fn no_completions_in_after_tripple_colon() {
+fn no_completions_in_invalid_path() {
     check(
         r#"
 fn foo { crate:::$0 }
 "#,
         expect![""],
     );
+    check(
+        r#"
+fn foo { crate::::$0 }
+"#,
+        expect![""],
+    )
 }