fix(extraction): never fabricate an edge from a call-result receiver (#1748)

A member call whose receiver is itself a call — `d.setdefault(k, []).append(v)`,
`make().run()` — used to drop the receiver at extraction time, degrade to the
bare method name, and exact-match any top-level project symbol of that name
(Python and JavaScript/TypeScript). Keep the inner callee encoded as
`<inner>().<method>` in the TS extractor and native kernel; the name-matcher
refuses to guess for that shape (store-accessor exception only). Based on
#1692, rebased onto main after #1746. Fixes #1683.

Co-authored-by: Colby McHenry <colbymchenry@users.noreply.github.com>

codegraph-kernel/src/python.rs

@@ -608,6 +608,13 @@ impl<'t> Walker<'t> {
                         } else {
                             callee_name = method_name.to_string();
                         }
+                    } else if let Some(r) = receiver.filter(|r| r.kind() == "call") {
+                        // Call receiver — `d.setdefault(k, []).append(v)` (#1683):
+                        // `<inner>().<method>`, or nothing when the inner callee
+                        // is not a plain name / attribute chain. Mirrors
+                        // TreeSitterExtractor.extractCall.
+                        let Some(inner) = self.plain_inner_callee(r) else { return };
+                        callee_name = format!("{inner}().{method_name}");
                     } else {
                         callee_name = method_name.to_string();
                     }
@@ -626,6 +633,22 @@ impl<'t> Walker<'t> {
         }
     }
 
+    /// The callee of a call receiver when it is a plain identifier or attribute
+    /// chain (`make`, `d.setdefault`), whitespace stripped (#1683).
+    fn plain_inner_callee(&self, call: Node<'t>) -> Option<String> {
+        let inner = call.child_by_field_name("function")?;
+        let text: String = self.text(inner).chars().filter(|c| !c.is_whitespace()).collect();
+        if text.is_empty() {
+            return None;
+        }
+        let ok = text.split('.').all(|seg| {
+            let mut chars = seg.chars();
+            matches!(chars.next(), Some(c) if c.is_ascii_alphabetic() || c == '_')
+                && chars.all(|c| c.is_ascii_alphanumeric() || c == '_')
+        });
+        if ok { Some(text) } else { None }
+    }
+
     /// extractDecoratorsFor — python decorators are PRECEDING SIBLINGS inside
     /// decorated_definition. Only bare-identifier decorators yield a target
     /// (python's `call` kind isn't `call_expression`, and `attribute` isn't in

codegraph-kernel/src/tsjs/extractors.rs

@@ -1103,9 +1103,14 @@ impl<'t> Walker<'t> {
                         } else {
                             callee_name = method_name.to_string();
                         }
+                    } else if let Some(r) = receiver.filter(|r| r.kind() == "call_expression") {
+                        // Call receiver — `make().run()` (#1683): keep the inner
+                        // callee as `<inner>().<method>`, or emit nothing when it
+                        // is not a plain name / member chain. Mirrors
+                        // TreeSitterExtractor.extractCall.
+                        let Some(inner) = self.plain_inner_callee(r) else { return };
+                        callee_name = format!("{inner}().{method_name}");
                     } else {
-                        // (the call-receiver re-encode branches are other
-                        // languages'; TS/JS keeps the bare method name)
                         callee_name = method_name.to_string();
                     }
                 }
@@ -1128,6 +1133,22 @@ impl<'t> Walker<'t> {
 
     // --- extractInstantiation -----------------------------------------------------------
 
+    /// The callee of a call-expression receiver when it is a plain identifier
+    /// or member chain (`make`, `d.setdefault`), whitespace stripped (#1683).
+    fn plain_inner_callee(&self, call: Node<'t>) -> Option<String> {
+        let inner = call.child_by_field_name("function")?;
+        let text: String = self.text(inner).chars().filter(|c| !c.is_whitespace()).collect();
+        if text.is_empty() {
+            return None;
+        }
+        let ok = text.split('.').all(|seg| {
+            let mut chars = seg.chars();
+            matches!(chars.next(), Some(c) if c.is_ascii_alphabetic() || c == '_' || c == '$')
+                && chars.all(|c| c.is_ascii_alphanumeric() || c == '_' || c == '$')
+        });
+        if ok { Some(text) } else { None }
+    }
+
     pub(super) fn extract_instantiation(&mut self, node: Node<'t>) {
         if self.stack.is_empty() {
             return;