faster startup and fix asan error

internal/engine.cm

@@ -331,7 +331,10 @@ var wildcard_sinks = []
 var warned_channels = {}
 var stack_channels = {}
 
+var log_quiet_channels = { shop: true }
+
 function log(name, args) {
+  if (log_quiet_channels[name]) return
   var msg = args[0]
   if (msg == null) msg = ""
   os.print(`[${text(_cell.id, 0, 5)}] [${name}]: ${msg}\n`)
@@ -559,13 +562,7 @@ log = function(name, args) {
   var stack = null
   var rec = null
 
-  if (!sinks && length(wildcard_sinks) == 0) {
-    if (!warned_channels[name]) {
-      warned_channels[name] = true
-      os.print(`[warn] log channel '${name}' has no sinks configured\n`)
-    }
-    return
-  }
+  if (!sinks && length(wildcard_sinks) == 0) return
 
   // C-provided stack (from JS_Log callback) overrides caller_info/os.stack
   if (c_stack && length(c_stack) > 0) {
@@ -1247,17 +1244,21 @@ $_.clock(_ => {
 
   var pkg = file_info ? file_info.package : null
 
-  // Pre-build C modules for all transitive dependencies
+  // Verify all transitive dependency packages are present
   var _deps = null
   var _di = 0
-  if (pkg && shop.ensure_package_dylibs) {
+  var _dep_dir = null
+  if (pkg) {
     _deps = package.gather_dependencies(pkg)
     _di = 0
     while (_di < length(_deps)) {
-      shop.ensure_package_dylibs(_deps[_di])
+      _dep_dir = package.get_dir(_deps[_di])
+      if (!fd.is_dir(_dep_dir)) {
+        log.error('missing dependency package: ' + _deps[_di])
+        disrupt
+      }
       _di = _di + 1
     }
-    shop.ensure_package_dylibs(pkg)
   }
 
   env.use = function(path) {

internal/os.c

@@ -34,14 +34,10 @@
 static JSClassID js_dylib_class_id;
 
 static void js_dylib_finalizer(JSRuntime *rt, JSValue val) {
-  void *handle = JS_GetOpaque(val, js_dylib_class_id);
-  if (handle) {
-#ifdef _WIN32
-    FreeLibrary((HMODULE)handle);
-#else
-    dlclose(handle);
-#endif
-  }
+  /* Do NOT dlclose here. Loaded dylibs contain finalizer functions for other
+     JS objects; if the dylib is freed before those objects during
+     JS_FreeContext teardown, calling their finalizers would SEGV.
+     The OS reclaims all loaded libraries on process exit. */
 }
 
 static JSClassDef js_dylib_class = {