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diff -up vim80/src/globals.h.cve1621 vim80/src/globals.h
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--- vim80/src/globals.h.cve1621 2022-05-24 12:46:44.883952323 +0200
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+++ vim80/src/globals.h 2022-05-24 12:47:30.534183523 +0200
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@@ -1657,6 +1657,11 @@ EXTERN int *eval_lavars_used INIT(= NULL
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EXTERN int ctrl_break_was_pressed INIT(= FALSE);
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#endif
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+#ifdef FEAT_SPELL
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+EXTERN char e_illegal_character_in_word[]
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+ INIT(= N_("E1280: Illegal character in word"));
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+#endif
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+
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/*
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* Optional Farsi support. Include it here, so EXTERN and INIT are defined.
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*/
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4cbc0c |
diff -up vim80/src/mbyte.c.cve1621 vim80/src/mbyte.c
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4cbc0c |
--- vim80/src/mbyte.c.cve1621 2018-04-09 14:55:56.000000000 +0200
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+++ vim80/src/mbyte.c 2022-05-24 12:22:13.166893098 +0200
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4cbc0c |
@@ -4034,7 +4034,7 @@ theend:
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convert_setup(&vimconv, NULL, NULL);
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}
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-#if defined(FEAT_GUI_GTK) || defined(PROTO)
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+#if defined(FEAT_GUI_GTK) || defined(FEAT_SPELL) || defined(PROTO)
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/*
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* Return TRUE if string "s" is a valid utf-8 string.
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* When "end" is NULL stop at the first NUL.
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4cbc0c |
diff -up vim80/src/spellfile.c.cve1621 vim80/src/spellfile.c
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4cbc0c |
--- vim80/src/spellfile.c.cve1621 2022-05-24 12:22:13.167893104 +0200
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4cbc0c |
+++ vim80/src/spellfile.c 2022-05-24 12:49:55.816919350 +0200
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@@ -4441,6 +4441,10 @@ store_word(
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int res = OK;
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char_u *p;
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+ // Avoid adding illegal bytes to the word tree.
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+ if (enc_utf8 && !utf_valid_string(word, NULL))
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+ return FAIL;
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+
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(void)spell_casefold(word, len, foldword, MAXWLEN);
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for (p = pfxlist; res == OK; ++p)
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{
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4cbc0c |
@@ -6251,6 +6255,12 @@ spell_add_word(
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int i;
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4cbc0c |
char_u *spf;
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4cbc0c |
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+ if (enc_utf8 && !utf_valid_string(word, NULL))
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+ {
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+ emsg(_(e_illegal_character_in_word));
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+ return;
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+ }
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+
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if (idx == 0) /* use internal wordlist */
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{
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4cbc0c |
if (int_wordlist == NULL)
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