On Mi, 18 Sep 2013, Christ van Willegen wrote:
> I accidentally searched the following
>
> /\(
>
> This gives me the error message
>
> E54: Unmatched \(
> E54: Unmatched \(
>
> twice.
This happens, because your 're' setting is 0. That means, if the
backtracking engine fails to compile the regular expression, vim will
automatically retry with the old engine. Therefore you get the error for
each tried regexp engine.
I think, this patch prevents this:
diff --git a/src/regexp.c b/src/regexp.c
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -8022,6 +8022,8 @@
*/
if (regexp_engine == AUTOMATIC_ENGINE)
prog = bt_regengine.regcomp(expr, re_flags);
+ if (emsg_off)
+ emsg_off--;
}
return prog;
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -6644,6 +6644,8 @@
/* TODO: only give this error for debugging? */
if (post_ptr >= post_end)
EMSGN("Internal error: estimated max number of states insufficient:
%ld", post_end - post_star
+ if (p_re == 0)
+ emsg_off++; /* prevent double errors */
goto fail; /* Cascaded (syntax?) error */
}
>
> When I search for
>
> /()
>
> I get
>
> E486: Pattern not found: ()
>
> (once)
>
> I have my command history set to 2 (:set ch=2), so I see them both at once.
>
> I'm running vim 7.4.27
>
> Christ van Willegen
Mit freundlichen Grüßen
Christian
--
Gott ist eine vom Menschen erdachte Hypothese bei dem Versuch, mit dem
Problem der Existenz fertigzuwerden.
-- Aldous Huxley
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