fix

src/find_definitions.js

@@ -76,7 +76,7 @@ export const find_definitions = (ast, globals, scope = {}, closure_scope = {}, m
   
 
   // sanity check
-  if(!globals instanceof Set) {
+  if(!(globals instanceof Set)) {
     throw new Error('not a set')
   }
 

test/utils.js

@@ -52,7 +52,11 @@ export const do_parse = code => parse(
 )
 
 export const parse_modules = (entry, modules) => 
-  load_modules(entry, module_name => modules[module_name])
+  load_modules(
+    entry, 
+    module_name => modules[module_name],
+    new Set(Object.getOwnPropertyNames(globalThis.run_window))
+  )
 
 export const eval_tree = code => {
   const parse_result = do_parse(code)