(compilation-error-regexp-alist-alist) <gnu>:

Rule out trailing spaces in file and directory names as well.

lisp/ChangeLog

@@ -16,6 +16,9 @@
 
 2008-04-30  Stefan Monnier  <monnier@iro.umontreal.ca>
 
+	* progmodes/compile.el (compilation-error-regexp-alist-alist) <gnu>:
+	Rule out trailing spaces in file and directory names as well.
+
 	* minibuffer.el (completion--do-completion): Move point even if the
 	completion makes no change.
 	(completion-pcm-try-completion): Fix computation of new point.

lisp/progmodes/compile.el

@@ -237,8 +237,13 @@ of[ \t]+\"?\\([a-zA-Z]?:?[^\":\n]+\\)\"?:" 3 2 nil (1))
      ;; times of the form "HH:MM:SS" where MM is taken as a line number, so
      ;; the last line tries to rule out message where the info after the
      ;; line number starts with "SS".  --Stef
+
+     ;; The core of the regexp is the one with *?.  It says that a file name
+     ;; can be composed of any non-newline char, but it also rules out some
+     ;; valid but unlikely cases, such as a trailing space or a space
+     ;; followed by a -.
      "^\\(?:[[:alpha:]][-[:alnum:].]+: ?\\)?\
-\\([0-9]*[^0-9\n]\\(?:[^\n ]\\| [^-\n]\\)*?\\): ?\
+\\([0-9]*[^0-9\n]\\(?:[^\n ]\\| [^-/\n]\\)*?\\): ?\
 \\([0-9]+\\)\\(?:\\([.:]\\)\\([0-9]+\\)\\)?\
 \\(?:-\\([0-9]+\\)?\\(?:\\3\\([0-9]+\\)\\)?\\)?:\
 \\(?: *\\(\\(?:Future\\|Runtime\\)?[Ww]arning\\|W:\\)\\|\