progress on aot

internal/engine.cm

@@ -22,6 +22,9 @@ function use_embed(name) {
   return load_internal("js_core_" + name + "_use")
 }
 
+// These duplicate C builtins from runtime.c, but are needed because the GC can
+// lose properties on the global object after compaction. The runtime_env provides
+// a stable way for modules to access them via env_record linking.
 function logical(val1) {
   if (val1 == 0 || val1 == false || val1 == "false" || val1 == null)
     return false;
@@ -101,7 +104,7 @@ function load_pipeline_module(name, env) {
 }
 
 // Load compilation pipeline
-var pipeline_env = {use: use_embed}
+var pipeline_env = stone({use: use_embed})
 var tokenize_mod = load_pipeline_module('tokenize', pipeline_env)
 var parse_mod = load_pipeline_module('parse', pipeline_env)
 var fold_mod = load_pipeline_module('fold', pipeline_env)
@@ -222,6 +225,7 @@ function use_core(path) {
   // Build env: merge core_extras
   env = {use: use_core}
   arrfor(array(core_extras), function(k) { env[k] = core_extras[k] })
+  env = stone(env)
 
   var hash = null
   var cached_path = null
@@ -398,7 +402,9 @@ var parallel = pronto.parallel
 var race = pronto.race
 var sequence = pronto.sequence
 
-// Fill runtime_env (same object reference shop holds)
+// Fill runtime_env — includes duplicates of C builtins because the GC can
+// lose global object properties after compaction. Modules resolve these via
+// env_record, not the global.
 runtime_env.logical = logical
 runtime_env.some = some
 runtime_env.every = every
@@ -1045,6 +1051,7 @@ $_.clock(_ => {
   }
   env.args = _cell.args.arg
   env.log  = log
+  env = stone(env)
 
   var source_blob = fd.slurp(prog_path)
   var hash = content_hash(source_blob)