Merge branch 'improve_compile_error' into audit_dups

internal/engine.cm

@@ -506,20 +506,37 @@ var REPLYTIMEOUT = 60 // seconds before replies are ignored
 // --- Logging system (bootstrap phase) ---
 // Early log: prints to console before toml/time/json are loaded.
 // Upgraded to full sink-based system after config loads (see load_log_config below).
+// The bootstrap log forwards to _log_full once the full system is ready, so that
+// modules loaded early (like shop.cm) get full logging even though they captured
+// the bootstrap function reference.
 
 var log_config = null
 var channel_sinks = {}
 var wildcard_sinks = []
 var warned_channels = {}
 var stack_channels = {}
+var _log_full = null
 
 var log_quiet_channels = { shop: true }
 
 function log(name, args) {
+  if (_log_full) return _log_full(name, args)
   if (log_quiet_channels[name]) return
   var msg = args[0]
+  var stk = null
+  var i = 0
+  var fr = null
   if (msg == null) msg = ""
   os.print(`[${text(_cell.id, 0, 5)}] [${name}]: ${msg}\n`)
+  if (name == "error") {
+    stk = os.stack(2)
+    if (stk && length(stk) > 0) {
+      for (i = 0; i < length(stk); i = i + 1) {
+        fr = stk[i]
+        os.print(`    at ${fr.fn} (${fr.file}:${text(fr.line)}:${text(fr.col)})\n`)
+      }
+    }
+  }
 }
 
 function actor_die(err)
@@ -648,6 +665,7 @@ function build_sink_routing() {
   var names = array(log_config.sink)
   arrfor(names, function(name) {
     var sink = log_config.sink[name]
+    if (!sink || !is_object(sink)) return
     sink._name = name
     if (!is_array(sink.channels)) sink.channels = []
     if (is_text(sink.exclude)) sink.exclude = [sink.exclude]
@@ -677,7 +695,7 @@ function load_log_config() {
       log_config = toml.decode(text(fd.slurp(log_path)))
     }
   }
-  if (!log_config || !log_config.sink) {
+  if (!log_config || !log_config.sink || length(array(log_config.sink)) == 0) {
     log_config = {
       sink: {
         terminal: {
@@ -787,6 +805,10 @@ log = function(name, args) {
 // Wire C-level JS_Log through the ƿit log system
 actor_mod.set_log(log)
 
+// Let the bootstrap log forward to the full system — modules loaded early
+// (before the full log was ready) captured the bootstrap function reference.
+_log_full = log
+
 var pronto = use_core('pronto')
 var fallback = pronto.fallback
 var parallel = pronto.parallel