* lisp/progmodes/compile.el
(compilation-error-regexp-alist-alist): Prior to this patch the
line that contains "from a.h:1:0," was seen as INFO and the line
that contains "from a.c:1:" was seen as a WARNING. This patch
makes them both INFO (bug#17826).
(gcc-include
"^\\(?:In file included \\| \\|\t\\)from \
\\([0-9]*[^0-9\n]\\(?:[^\n :]\\| [^-/\n]\\|:[^ \n]\\)*?\\):\
-\\([0-9]+\\)\\(?::\\([0-9]+\\)\\)?\\(?:\\(:\\)\\|\\(,\\|$\\)\\)?"
- 1 2 3 (4 . 5))
+\\([0-9]+\\)\\(?::\\([0-9]+\\)\\)?\\(?:\\([:,]\\|$\\)\\)?"
+ 1 2 3 (nil . 4))
(ruby-Test::Unit
"^ [[ ]?\\([^ (].*\\):\\([1-9][0-9]*\\)\\(\\]\\)?:in " 1 2)