(trivial_regexp_p): \_ is no longer a trivial regexp.

diff --git a/src/search.c b/src/search.c
index c60d68b9374266735283f1400eaf6f57b9c56f69..e5e4c3f867a6e5c970d7e390f844b4e877b97e94 100644 (file)
--- a/src/search.c
+++ b/src/search.c
@@ -957,7 +957,7 @@ trivial_regexp_p (regexp)
            {
            case '|': case '(': case ')': case '`': case '\'': case 'b':
            case 'B': case '<': case '>': case 'w': case 'W': case 's':
-           case 'S': case '=': case '{': case '}':
+           case 'S': case '=': case '{': case '}': case '_':
            case 'c': case 'C': /* for categoryspec and notcategoryspec */
            case '1': case '2': case '3': case '4': case '5':
            case '6': case '7': case '8': case '9':