Keep around file info for dumped functions and variables without docstrings. src/ChangeLog addition: 2010-04-17 Aidan Kehoe <kehoea@parhasard.net> * doc.c (Fdocumentation): If we have a zero length doc string in DOC, as may happen for undocumented compiled function objects which nonetheless have file information stored, return nil. (Fsnarf_documentation): DOC info existing for compiled functions without docstrings is perfectly legitimate, now the file is also used to store file names. * bytecode.c (set_compiled_function_documentation): Allow this function to set the documentation successfully for compiled function objects that don't currently have documentation; most relevant for functions without docstrings which have file information stored in DOC. lib-src/ChangeLog addition: 2010-04-17 Aidan Kehoe <kehoea@parhasard.net> * make-docfile.c (scan_lisp_file): Even if a function doesn't have a doc string, store its file name in DOC. lisp/ChangeLog addition: 2010-04-17 Aidan Kehoe <kehoea@parhasard.net> * loadup.el (load-history): Be a bit more discriminate in the entries we remove from load-history, only removing those where the information is entirely available from DOC. Fixes problems finding the files that dumped undocumented variables were loaded from, reported by Didier Verna. * loadhist.el (symbol-file): Correct a regexp here, I had forgotten to double a backslash.

--- a/lisp/loadhist.el	Thu Apr 15 20:14:08 2010 -0500
+++ b/lisp/loadhist.el	Sat Apr 17 10:40:03 2010 +0100
@@ -89,7 +89,7 @@
           built-in-file
         ;; This is a bit heuristic, but shouldn't realistically be a
         ;; problem:
-        (if (string-match "\.elc?$" built-in-file)
+        (if (string-match #r"\.elc?$" built-in-file)
             (concat (if (file-readable-p source-lisp)
 			source-lisp
 		      lisp-directory)