diff --git a/vlib/v/checker/mark_used.v b/vlib/v/checker/mark_used.v
index 4ed7e223ae..aa9235a11a 100644
--- a/vlib/v/checker/mark_used.v
+++ b/vlib/v/checker/mark_used.v
@@ -42,7 +42,18 @@ fn (mut c Checker) mark_used(ast_files []ast.File) {
 	c.table.used_fns['panic'] = true
 	c.table.used_fns['eprintln'] = true
 	c.table.used_fns['print_backtrace_skipping_top_frames'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_mac'] = true
 	c.table.used_fns['print_backtrace_skipping_top_frames_linux'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_freebsd'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_windows'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_mingw'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_msvc'] = true
+	c.table.used_fns['print_backtrace_skipping_top_frames_tcc'] = true
+	c.table.used_fns['is_atty'] = true
+	c.table.used_fns['add_unhandled_exception_handler'] = true
+	c.table.used_fns['add_vectored_exception_handler'] = true
+	c.table.used_fns['unhandled_exception_handler'] = true
+	c.table.used_fns['restore_codepage'] = true
 	c.table.used_fns['new_array_from_c_array'] = true
 	c.table.used_fns['__new_array_with_default'] = true
 	c.table.used_fns['__new_array'] = true
diff --git a/vlib/v/compiler_errors_test.v b/vlib/v/compiler_errors_test.v
index ac4180688a..39bc1a6f61 100644
--- a/vlib/v/compiler_errors_test.v
+++ b/vlib/v/compiler_errors_test.v
@@ -86,8 +86,8 @@ fn test_all() {
 	tasks.add('', module_dir, '-prod run', '.out', module_tests, true)
 	tasks.add('', run_dir, 'run', '.run.out', run_tests, false)
 	tasks.add('', skip_unused_dir, 'run', '.run.out', skip_unused_dir_tests, false)
-	tasks.add('', skip_unused_dir, '-skip-unused run', '.skip_unused.run.out', skip_unused_dir_tests,
-		false)
+	tasks.add('', skip_unused_dir, '-d no_backtrace -skip-unused run', '.skip_unused.run.out',
+		skip_unused_dir_tests, false)
 	tasks.run()
 	if github_job == 'ubuntu-tcc' {
 		// these should be run serially, since they depend on setting and using environment variables