Forbid Batak killers after vowel signs

src/gen-use-table.py

diff --git a/src/gen-use-table.py b/src/gen-use-table.py
index 4ded542..bbcaaf8 100755
--- a/src/gen-use-table.py
+++ b/src/gen-use-table.py
@@ -297,6 +297,9 @@
 		if U == 0x17DD: UISC = Vowel_Dependent
 		if 0x1CE2 <= U <= 0x1CE8: UISC = Cantillation_Mark
 
+		# TODO: https://github.com/harfbuzz/harfbuzz/pull/627
+		if 0x1BF2 <= U <= 0x1BF3: UISC = Nukta; UIPC = Bottom
+
 		# TODO: U+1CED should only be allowed after some of
 		# the nasalization marks, maybe only for U+1CE9..U+1CF1.
 		if U == 0x1CED: UISC = Tone_Mark

src/hb-ot-shape-complex-use-table.cc

diff --git a/src/hb-ot-shape-complex-use-table.cc b/src/hb-ot-shape-complex-use-table.cc
index fd6978f..c1a3362 100644
--- a/src/hb-ot-shape-complex-use-table.cc
+++ b/src/hb-ot-shape-complex-use-table.cc
@@ -307,7 +307,7 @@
   /* 1BC0 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 1BD0 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 1BE0 */     B,     B,     B,     B,     B,     B, CMAbv,  VPst,  VAbv,  VAbv,  VPst,  VPst,  VPst,  VAbv,  VPst,  VAbv,
-  /* 1BF0 */  FAbv,  FAbv,  VPst,  VPst,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,
+  /* 1BF0 */  FAbv,  FAbv, CMBlw, CMBlw,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,
 
   /* Lepcha */
 

test/shaping/fonts/sha1sum/59a585a63b3df608fbeef00956c8c108deec7de6.ttf

diff --git a/test/shaping/fonts/sha1sum/59a585a63b3df608fbeef00956c8c108deec7de6.ttf b/test/shaping/fonts/sha1sum/59a585a63b3df608fbeef00956c8c108deec7de6.ttf
new file mode 100644
index 0000000..70f0513
--- /dev/null
+++ b/test/shaping/fonts/sha1sum/59a585a63b3df608fbeef00956c8c108deec7de6.ttf
Binary files differ

test/shaping/tests/use-syllable.tests

diff --git a/test/shaping/tests/use-syllable.tests b/test/shaping/tests/use-syllable.tests
index 0661142..a48633b 100644
--- a/test/shaping/tests/use-syllable.tests
+++ b/test/shaping/tests/use-syllable.tests
@@ -4,3 +4,4 @@
 fonts/sha1sum/e68a88939e0f06e34d2bc911f09b70890289c8fd.ttf::U+AA00,U+AA35,U+AA36:[a_cham=0+1121|laMedial_waMedial_cham=0@43,0+0]
 fonts/sha1sum/074a5ae6b19de8f29772fdd5df2d3d833f81f5e6.ttf:--no-glyph-names:U+11320,U+20F0,U+11367:[3=0+502|1=0@33,0+0|4=0@300,8+0]
 fonts/sha1sum/373e67bf41ca264e260a9716162b71a23549e885.ttf:--no-glyph-names:U+A8AC,U+A8B4,U+A8B5:[2=0+377|3=0+242|4=0+210]
+fonts/sha1sum/59a585a63b3df608fbeef00956c8c108deec7de6.ttf:--no-glyph-names:U+1BC7,U+1BEA,U+1BF3:[1=0+749|2=0+402|4=0+535|3=0+401]