From cd33c4042a022a3e1dea32da4c5541d6ca568cf0 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 15 Mar 2022 03:39:12 +0100
Subject: [PATCH] MatchRule: Do not go back before the pre-ptr

pre_ptr is already one byte before the current letter, so we do not want
to subtract 1 again. Otherwise this would for instance underflow word_iz
of addPluralSuffixes.
---
 src/libespeak-ng/dictionary.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libespeak-ng/dictionary.c b/src/libespeak-ng/dictionary.c
index f93be021..cc1cd33d 100644
--- a/src/libespeak-ng/dictionary.c
+++ b/src/libespeak-ng/dictionary.c
@@ -2049,7 +2049,7 @@ static void MatchRule(Translator *tr, char *word[], char *word_start, int group_
 					break;
 				case RULE_NOVOWELS:
 				{
-					char *p = pre_ptr - letter_xbytes - 1;
+					char *p = pre_ptr - letter_xbytes;
 					while (letter_w != RULE_SPACE) {
 						if (IsLetter(tr, letter_w, LETTERGP_VOWEL2)) {
 							failed = 1;