https://bugs.gentoo.org/917618
https://bugs.documentfoundation.org/show_bug.cgi?id=158108

From bcd5d851ebe91fc22edd3ea92be4a674bd13acba Mon Sep 17 00:00:00 2001
From: Alfred Wingate <parona@protonmail.com>
Date: Mon, 20 Nov 2023 14:47:28 +0200
Subject: [PATCH] Remove use of the now removed LBCMNoChain options

* This change removes its use and explicitly prevents chaining where
  the rule would have applied.

https://github.com/unicode-org/icu/commit/84e47620692be90950d090f2f4722494b020ad96
https://github.com/unicode-org/icu/commit/9d9256f3b792100cda697c7bcf52bacfbc3bca87

Signed-off-by: Alfred Wingate <parona@protonmail.com>
--- a/i18npool/source/breakiterator/data/line.txt
+++ b/i18npool/source/breakiterator/data/line.txt
@@ -14,7 +14,6 @@
 #
 
 !!chain;
-!!LBCMNoChain;
 
 
 !!lookAheadHardBreak;
@@ -206,13 +205,13 @@ $CR $LF {100};
 #
 $LB4NonBreaks?  $LB4Breaks {100};    # LB 5  do not break before hard breaks.
 $CAN_CM $CM*    $LB4Breaks {100};
-$CM+            $LB4Breaks {100};
+^$CM+           $LB4Breaks {100};
 
 # LB 7         x SP
 #              x ZW
 $LB4NonBreaks [$SP $ZW];
 $CAN_CM $CM*  [$SP $ZW];
-$CM+          [$SP $ZW];
+^$CM+         [$SP $ZW];
 
 #
 # LB 8         Break after zero width space
@@ -226,14 +225,14 @@ $LB8NonBreaks = [[$LB4NonBreaks] - [$ZW]];
 #                                See definition of $CAN_CM.
 
 $CAN_CM $CM+;                   #  Stick together any combining sequences that don't match other rules.
-$CM+;
+^$CM+;
 
 #
 # LB 11  Do not break before or after WORD JOINER & related characters.
 #
 $CAN_CM $CM*  $WJcm;
 $LB8NonBreaks $WJcm;
-$CM+          $WJcm;
+^$CM+          $WJcm;
 
 $WJcm [^$CAN_CM];
 $WJcm $CAN_CM $CM*;
@@ -243,7 +242,7 @@ $WJcm $CAN_CM $CM*;
 #
 #         (!SP) x GL
 [$LB8NonBreaks-$SP] $CM* $GLcm;
-$CM+               $GLcm;
+^$CM+               $GLcm;
 
 #         GL  x
 $GLcm ($LB8Breaks | $SP);
@@ -260,19 +259,19 @@ $GLcm [$LB8NonBreaks-$SP] $CM*;     # Don't let a combining mark go onto $CR, $B
 #
 $LB8NonBreaks $CL;
 $CAN_CM $CM*  $CL;
-$CM+          $CL;              # by rule 10, stand-alone CM behaves as AL
+^$CM+         $CL;              # by rule 10, stand-alone CM behaves as AL
 
 $LB8NonBreaks $EX;
 $CAN_CM $CM*  $EX;
-$CM+          $EX;              # by rule 10, stand-alone CM behaves as AL
+^$CM+         $EX;              # by rule 10, stand-alone CM behaves as AL
 
 $LB8NonBreaks $IS;
 $CAN_CM $CM*  $IS;
-$CM+          $IS;              # by rule 10, stand-alone CM behaves as AL
+^$CM+         $IS;              # by rule 10, stand-alone CM behaves as AL
 
 $LB8NonBreaks $SY;
 $CAN_CM $CM*  $SY;
-$CM+          $SY;              # by rule 10, stand-alone CM behaves as AL
+^$CM+         $SY;              # by rule 10, stand-alone CM behaves as AL
 
 
 #
@@ -302,7 +301,7 @@ $LB18Breaks    = [$LB8Breaks $SP];
 # LB 19
 #         x QU
 $LB18NonBreaks $CM* $QUcm;
-$CM+                $QUcm;
+^$CM+               $QUcm;
 
 #         QU  x
 $QUcm .?;
@@ -331,7 +330,7 @@ $HLcm ($HYcm | $BAcm) [^$CB]?;
 
 # LB 22
 ($ALcm | $HLcm) $INcm;
-$CM+     $INcm;     #  by rule 10, any otherwise unattached CM behaves as AL
+^$CM+    $INcm;     #  by rule 10, any otherwise unattached CM behaves as AL
 $IDcm    $INcm;
 $INcm    $INcm;
 $NUcm    $INcm;
@@ -341,7 +340,7 @@ $NUcm    $INcm;
 $IDcm  $POcm;
 $ALcm  $NUcm;       # includes $LB19
 $HLcm  $NUcm;
-$CM+   $NUcm;       # Rule 10, any otherwise unattached CM behaves as AL
+^$CM+  $NUcm;       # Rule 10, any otherwise unattached CM behaves as AL
 $NUcm  $ALcm;
 $NUcm  $HLcm;
 
@@ -373,7 +372,7 @@ $PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm);
 # LB 28   Do not break between alphabetics
 #
 ($ALcm | $HLcm) ($ALcm | $HLcm);
-$CM+ ($ALcm | $HLcm);      # The $CM+ is from rule 10, an unattached CM is treated as AL
+^$CM+ ($ALcm | $HLcm);      # The $CM+ is from rule 10, an unattached CM is treated as AL
 
 # LB 29
 $IScm ($ALcm | $NUcm);
@@ -383,7 +382,7 @@ $IScm ($ALcm | $NUcm);
 #           and opening or closing punctuation
 #
 ($ALcm | $HLcm | $NUcm) $OPcm;
-$CM+ $OPcm;
+^$CM+ $OPcm;
 $CLcm ($ALcm | $HLcm | $NUcm);
 
 #
@@ -393,32 +392,32 @@ $CLcm ($ALcm | $HLcm | $NUcm);
 
 !!reverse;
 
-$CM+ $ALPlus;
-$CM+ $BA;
-$CM+ $BB;
-$CM+ $B2;
-$CM+ $CL;
-$CM+ $EX;
-$CM+ $GL;
-$CM+ $HL;
-$CM+ $HY;
-$CM+ $H2;
-$CM+ $H3;
-$CM+ $ID;
-$CM+ $IN;
-$CM+ $IS;
-$CM+ $JL;
-$CM+ $JV;
-$CM+ $JT;
-$CM+ $NS;
-$CM+ $NU;
-$CM+ $OP;
-$CM+ $PO;
-$CM+ $PR;
-$CM+ $QU;
-$CM+ $SY;
-$CM+ $WJ;
-$CM+;
+^$CM+ $ALPlus;
+^$CM+ $BA;
+^$CM+ $BB;
+^$CM+ $B2;
+^$CM+ $CL;
+^$CM+ $EX;
+^$CM+ $GL;
+^$CM+ $HL;
+^$CM+ $HY;
+^$CM+ $H2;
+^$CM+ $H3;
+^$CM+ $ID;
+^$CM+ $IN;
+^$CM+ $IS;
+^$CM+ $JL;
+^$CM+ $JV;
+^$CM+ $JT;
+^$CM+ $NS;
+^$CM+ $NU;
+^$CM+ $OP;
+^$CM+ $PO;
+^$CM+ $PR;
+^$CM+ $QU;
+^$CM+ $SY;
+^$CM+ $WJ;
+^$CM+;
 
 
 #
@@ -468,7 +467,7 @@ $LF $CR;
 #    X   $CM needs to behave like X, where X is not $SP or controls.
 #    $CM not covered by the above needs to behave like $AL
 # Stick together any combining sequences that don't match other rules.
-$CM+ $CAN_CM;
+^$CM+ $CAN_CM;
 
 
 # LB 11
@@ -606,8 +605,8 @@ $CM* ($ALPlus | $HL | $NU) $CM* ($CL | $SY)+ [^$SP];
 !!safe_reverse;
 
 # LB 7
-$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
-$CM+ $SP / .;
+^$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
+^$CM+ $SP / .;
 
 # LB 9
 $SP+ $CM* $OP;
-- 
2.42.1