Preserve import binding locations during module rewriting (#7378)

* Only wrap import references that need it.

* Preserve the import binding location for sourcemaps.

* Add tests.

packages/babel-helper-module-transforms/src/rewrite-live-references.js

@@ -181,7 +181,13 @@ const rewriteReferencesVisitor = {
     if (importData) {
       const ref = buildImportReference(importData, path.node);
 
-      if (path.parentPath.isCallExpression({ callee: path.node })) {
+      // Preserve the binding location so that sourcemaps are nicer.
+      ref.loc = path.node.loc;
+
+      if (
+        path.parentPath.isCallExpression({ callee: path.node }) &&
+        t.isMemberExpression(ref)
+      ) {
         path.replaceWith(t.sequenceExpression([t.numericLiteral(0), ref]));
       } else if (path.isJSXIdentifier() && t.isMemberExpression(ref)) {
         const { object, property } = ref;