diff --git a/asdf.asd b/asdf.asd
index e54749ad4d5150dc3bf57ad15639a2122f2e9026..e2b92fc925f0702ce77991538a51bf25859b8664 100644
--- a/asdf.asd
+++ b/asdf.asd
@@ -74,7 +74,7 @@
   :licence "MIT"
   :description "Another System Definition Facility"
   :long-description "ASDF builds Common Lisp software organized into defined systems."
-  :version "2.33.3" ;; to be automatically updated by make bump-version
+  :version "2.33.4" ;; to be automatically updated by make bump-version
   :depends-on ()
   #+asdf3 :encoding #+asdf3 :utf-8
   ;; For most purposes, asdf itself specially counts as a builtin system.
diff --git a/header.lisp b/header.lisp
index 4de6f8480f59624697f9d7a0a9e41300938099d5..d84fc911ee991812538bbf4113a7c0cf64ef2083 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp -*-
-;;; This is ASDF 2.33.3: Another System Definition Facility.
+;;; This is ASDF 2.33.4: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
diff --git a/interface.lisp b/interface.lisp
index 6c801372018522e84c6b98c85abc9efdd7b66223..61f404cda2efe513f5f1541b3688303522bc44e3 100644
--- a/interface.lisp
+++ b/interface.lisp
@@ -19,7 +19,7 @@
   ;; TODO: automatically generate interface with reexport?
   (:export
    #:defsystem #:find-system #:locate-system #:coerce-name
-   #:oos #:operate #:traverse #:perform-plan
+   #:oos #:operate #:traverse #:perform-plan #:sequential-plan
    #:system-definition-pathname #:with-system-definitions
    #:search-for-system-definition #:find-component #:component-find-path
    #:compile-system #:load-system #:load-systems
diff --git a/plan.lisp b/plan.lisp
index d42f936932cbd2a0371ab719fb13257c5089b74d..bdf2651394d6d8a8d42d6309d923bdb5aa92fd30 100644
--- a/plan.lisp
+++ b/plan.lisp
@@ -241,9 +241,9 @@ the action of OPERATION on COMPONENT in the PLAN"))
               (and all-present up-to-date-p (operation-done-p o c) (not (action-forced-p plan o c))))
           (values done-stamp ;; return the hard-earned timestamp
                   (or just-done
-                      (or out-op ;; a file-creating op is done when all files are up to date
-                          ;; a image-effecting a placeholder op is done when it was actually run,
-                          (and op-time (eql op-time done-stamp))))) ;; with the matching stamp
+                      out-op ;; a file-creating op is done when all files are up to date
+                      ;; a image-effecting a placeholder op is done when it was actually run,
+                      (and op-time (eql op-time done-stamp)))) ;; with the matching stamp
           ;; done-stamp invalid: return a timestamp in an indefinite future, action not done yet
           (values t nil)))))
 
diff --git a/test/test-utilities.script b/test/test-utilities.script
index bb5a6a1cb83cc5aab9414ac2b0aafc4c2b746226..3af2c825761b663a7cd23304d7081e19e181a7d9 100644
--- a/test/test-utilities.script
+++ b/test/test-utilities.script
@@ -110,6 +110,7 @@
     asdf/component:version
     asdf/lisp-action:flags
     asdf/operation:feature
+    asdf/operation:original-initargs
     asdf/plan:index
     asdf/plan:forced
     asdf/plan:forced-not
diff --git a/uiop/utility.lisp b/uiop/utility.lisp
index 825a48f701eccf6fc4f5afcea6cb4911fb8b29ba..ab0b99c756396c95fe5336dc3c2def375476f89f 100644
--- a/uiop/utility.lisp
+++ b/uiop/utility.lisp
@@ -455,7 +455,8 @@ a simple vector of length 2, arguments to find-symbol* with result as above,
 or a string describing the format-control of a simple-condition."
     (etypecase x
       (symbol (typep condition x))
-      ((simple-vector 2) (typep condition (find-symbol* (svref x 0) (svref x 1) nil)))
+      ((simple-vector 2)
+       (ignore-errors (typep condition (find-symbol* (svref x 0) (svref x 1) nil))))
       (function (funcall x condition))
       (string (and (typep condition 'simple-condition)
                    ;; On SBCL, it's always set and the check triggers a warning
diff --git a/upgrade.lisp b/upgrade.lisp
index ffc4297b097e8be03e61198d02b54b03108bbdff..328bc4c2c86df756a1c9b23a3f080cbd269b7f45 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -52,7 +52,7 @@ You can compare this string with e.g.: (ASDF:VERSION-SATISFIES (ASDF:ASDF-VERSIO
          ;; "3.4.5.67" would be a development version in the official upstream of 3.4.5.
          ;; "3.4.5.0.8" would be your eighth local modification of official release 3.4.5
          ;; "3.4.5.67.8" would be your eighth local modification of development version 3.4.5.67
-         (asdf-version "2.33.3")
+         (asdf-version "2.33.4")
          (existing-version (asdf-version)))
     (setf *asdf-version* asdf-version)
     (when (and existing-version (not (equal asdf-version existing-version)))
diff --git a/version.lisp-expr b/version.lisp-expr
index 0bdfd007d598b638f8a9627c21f827c5cdfd2b87..80bf63d4deadf29c0f96c4461f81ddfc6d5c21dc 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1 +1 @@
-"2.33.3"
+"2.33.4"