diff --git a/runtime/syntax/testdir/dumps/sh_04_01.dump b/runtime/syntax/testdir/dumps/sh_04_01.dump
index 5a0ebe8..c536106 100644
--- a/runtime/syntax/testdir/dumps/sh_04_01.dump
+++ b/runtime/syntax/testdir/dumps/sh_04_01.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_00.dump b/runtime/syntax/testdir/dumps/sh_12_00.dump
new file mode 100644
index 0000000..d2d9928
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_00.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_01.dump b/runtime/syntax/testdir/dumps/sh_12_01.dump
new file mode 100644
index 0000000..fbc0082
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_01.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_02.dump b/runtime/syntax/testdir/dumps/sh_12_02.dump
new file mode 100644
index 0000000..a2cfb6c
--- /dev/null
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diff --git a/runtime/syntax/testdir/dumps/sh_12_03.dump b/runtime/syntax/testdir/dumps/sh_12_03.dump
new file mode 100644
index 0000000..e1e9af7
--- /dev/null
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diff --git a/runtime/syntax/testdir/dumps/sh_12_04.dump b/runtime/syntax/testdir/dumps/sh_12_04.dump
new file mode 100644
index 0000000..535ca23
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_04.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_05.dump b/runtime/syntax/testdir/dumps/sh_12_05.dump
new file mode 100644
index 0000000..9df4ef7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_05.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/sh_12_06.dump b/runtime/syntax/testdir/dumps/sh_12_06.dump
new file mode 100644
index 0000000..ab66951
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_06.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_07.dump b/runtime/syntax/testdir/dumps/sh_12_07.dump
new file mode 100644
index 0000000..d265221
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_07.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_08.dump b/runtime/syntax/testdir/dumps/sh_12_08.dump
new file mode 100644
index 0000000..ddbabda
--- /dev/null
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diff --git a/runtime/syntax/testdir/dumps/sh_12_09.dump b/runtime/syntax/testdir/dumps/sh_12_09.dump
new file mode 100644
index 0000000..35ba1f8
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_09.dump
@@ -0,0 +1,20 @@
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diff --git a/runtime/syntax/testdir/dumps/sh_12_10.dump b/runtime/syntax/testdir/dumps/sh_12_10.dump
new file mode 100644
index 0000000..f6d8ca0
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_12_10.dump
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diff --git a/runtime/syntax/testdir/dumps/sh_12_11.dump b/runtime/syntax/testdir/dumps/sh_12_11.dump
new file mode 100644
index 0000000..21edbc8
--- /dev/null
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+|n+0#00e0e07&|l|=+0#0000000&|'+0#af5f00255&| +0#0000000&@70
+|'+0#af5f00255&| +0#0000000&@73
+|e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|"+0#af5f00255&|$+0#e000e06&|{|n|l|}|"+0#af5f00255&|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&| |e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|'+0#0000000&|$|{|n|l|}|'|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&| +0#0000000&@14
+|e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|\+0#0000000&|"|$|{|n|l|}|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&| |e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|\+0#0000000&|'|$|{|n|l|}|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&| +0#0000000&@14
+>e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|$+0#0000000&|{|n|l|}|\|"|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&|;+0#0000000&| |e+0#af5f00255&|c|h|o| +0#e000002&|"+0#af5f00255&|$+0#e000e06&|{|1|#+0#af5f00255&|$+0#e000e06&|{|1|%+0#af5f00255&@1|[+0#00e0003&|!+8#e000e06&|$+0#0000000&|{|n|l|}|\|'|]+0#00e0003&|*+0#0000000&|}+0#e000e06&@1|"+0#af5f00255&| +0#0000000&@14
+@75
+|b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|)|;+0#0000000&| |b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|0+0#e000002&| +0#0000000&|1+0#e000002&|)+0#e000e06&|;+0#0000000&| |e+0#af5f00255&|v|a|l| +0#0000000&|b+0#00e0e07&|i|n|s|++0#0000000&|=|(+0#e000e06&|{|0+0#e000002&|.+0#0000000&@1|1+0#e000002&|}+0#e000e06&|)| +0#0000000&@34
+|b+0#00e0e07&|i|n|s|[+0#e000e06&|0+0#e000002&|]+0#e000e06&|=+0#0000000&|0+0#e000002&|;+0#0000000&| |b+0#00e0e07&|i|n|s|[+0#e000e06&|1+0#e000002&|]+0#e000e06&|=+0#0000000&|1+0#e000002&|;+0#0000000&| |e+0#af5f00255&|v|a|l| +0#0000000&|b+0#00e0e07&|i|n|s|++0#0000000&|=|(+0#e000e06&|\+0#0000000&|$+0#e000e06&|{|b|i|n|s|[|{|1+0#e000002&|.+0#0000000&@1|0+0#e000002&|}+0#e000e06&|]|}|)|;+0#0000000&| |u+0#af5f00255&|n|s|e|t| +0#00e0e07&|b|i|n|s|[+0#e000e06&|3+0#e000002&|]+0#e000e06&| +0#00e0e07&|b|i|n|s|[+0#e000e06&|2+0#e000002&|]+0#e000e06&| +0#0000000&
+|b+0#00e0e07&|i|n|s|=+0#0000000&|(+0#e000e06&|[+0#00e0e07&|8+0#e000002&|#|0|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|(@1|2+0#e000002&|#|1|0@1|)+0#e000e06&@1| +0#0000000&|[+0#00e0e07&|$+0#e000e06&|(@1|8+0#e000002&|#|1|)+0#e000e06&@1|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|(@1|2+0#e000002&|#|1|0|)+0#e000e06&@1| +0#0000000&|[+0#00e0e07&|3+0#e000002&|]+0#00e0e07&|=+0#0000000&|$+0#e000e06&|{|b|i|n|s|[|2+0#e000002&|#|1|]+0#e000e06&|}| +0#0000000&|$+0#e000e06&|{|b|i|n|s|[|0+0#e000002&|]+0#e000e06&|}|)| +0#0000000&@2
+|(+0#e000e06&|e+0#af5f00255&|c|h|o| +0#e000002&|s|u|m|[+0#e000e06&|$|(@1|b|i|n|s|[|1+0#e000002&|6|#|3|]+0#e000e06&| |+| |b|i|n|s|[|8+0#e000002&|#|2|]+0#e000e06&| |+| |b|i|n|s|[|2+0#e000002&|#|1|]+0#e000e06&| |+| |b|i|n|s|[|0+0#e000002&|]+0#e000e06&|)@1|]|)| +0#0000000&@13
+|e+0#af5f00255&|v|a|l| +0#0000000&|u+0#af5f00255&|n|s|e|t| +0#00e0e07&|b|i|n|s|[+0#e000e06&|{|0+0#e000002&|.+0#0000000&@1|$+0#e000e06&|(@1|$|{|#|b|i|n|s|[|*+0#0000000&|]+0#e000e06&|}| |-| |1+0#e000002&|)+0#e000e06&@1|}|]| +0#0000000&@32
+|:| @73
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|9@1|,|1| @8|B|o|t| 
diff --git a/runtime/syntax/testdir/input/sh_04.sh b/runtime/syntax/testdir/input/sh_04.sh
index e9ec5fe..1503790 100644
--- a/runtime/syntax/testdir/input/sh_04.sh
+++ b/runtime/syntax/testdir/input/sh_04.sh
@@ -20,8 +20,3 @@
 # This is OK
 : ${VariableB:-${VariableC:-eng}}
 : "${VariableB:-${VariableC:-eng}}"
-
-# First line is OK except its missing a closing "}",
-# so second line should have some error highlighting
-Variable=${VariableB:=${VariableC:={Var3:=${Var4:-eng}}}
-Variable=${VariableB:-${VariableC:-{Var3:=eng}}
diff --git a/runtime/syntax/testdir/input/sh_12.sh b/runtime/syntax/testdir/input/sh_12.sh
new file mode 100644
index 0000000..dcfa553
--- /dev/null
+++ b/runtime/syntax/testdir/input/sh_12.sh
@@ -0,0 +1,206 @@
+#!/bin/bash
+# VIM_TEST_SETUP highlight link shArrayValue Identifier
+# VIM_TEST_SETUP highlight link shBracketExprDelim Structure
+# VIM_TEST_SETUP highlight link shCharClass Todo
+# VIM_TEST_SETUP highlight link shRange CursorLine
+
+
+
+
+[[ ( "$1" == ?(-)+([0-9]) && "$1" =~ ^-?[[:digit:]]+$ &&
+'^?(-)+([[:digit:]])$' == "$2" && ! "^-?[0-9]+$" =~ "$2" ) ]] || :
+
+[ \( "$1" != "?(-)+([0-9])" -a "$1" != '?(-)+([[:digit:]])' \) ] &&
+[ \( "?(-)+([[:digit:]])" != "$2" -a '?(-)+([0-9])' != "$2" \) ] || :
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+: [[{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]
+: [[{][0-9]*[]}][[{][[:digit:]]*[[.].]}\
+]
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+case "$1" in
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [0-9]; : [!0-9]; : [^0-9];;
+[\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [0123]; : [!0123]; : [^0123];;
+[[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]*) : [1[.0.]]; : [![.0.]]; : [^[.0.]^];;
+[[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]*) : [1[=0=]]; : [![=0=]!]; : [^[=0=]];;
+[[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]*) ;;
+[[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]*) ;;
+[[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]*) : ?[[:foo:]]?; : [![:foo:]]?; : ?[^[:foo:]];;
+[[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]*) : [[:digit:]]; : [![:digit:]]; : [^[:digit:]];;
+[[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]*) : "${1^[[:lower:]]}"; : "${1^^[a-z]}";;
+[[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]*) : "${1,[[:upper:]]}"; : "${1,,[A-Z]}";;
+[[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]*) : "${1#[[:digit:]]}"; : "${1##[0-9]}";;
+[[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]*) : "${1%[[:digit:]]}"; : "${1%%[0-9]}";;
+[[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]*) : "${1/[][:digit:][]/[0-9]}"; : "${1//[]0-9[]/[0-9]}";;
+[[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]*) : "${1/#[][:digit:][]/[0-9]}"; : "${1/%[]0-9[]/[0-9]}";;
+[[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]*) : "${1#*[[.[.][.].]]}"; : "${1%[[.].][.[.]]*}"; : "${1#*" "[][]}";;
+[[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]*) : "${1#*[[=[=][=]=]]}"; : "${1%[[=]=][=[=]]*}"; : "${1#*\ [!][]}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]*) : "${1#*[!]]}"; : "${1#*[^]]}"; : "${1%[![]*}"; : "${1%[^[]*}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]*) : "${1#*[!\]]}"; : "${1#*[^\]]}"; : "${1%[!\[]*}"; : "${1%[^\[]*}";;
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]\
+*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]\
+*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]*) ;;
+[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}\
+]*) ;;
+[!][:digit:][:xdigit:]\ [^[:lower:]![:upper:]]*) ;;
+[^][:digit:]0-9a-fA-F\ [![:lower:]^[:upper:]]*) ;;
+[!!] | [!![] | [!]!] | [!^] | [!^[] | [!]^]) ;;
+[^!] | [^![] | [^]!] | [^^] | [^^[] | [^]^]) ;;
+esac
+
+# Match "\[0\]\[0\]", "{0}{0}", etc.
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*\
+[[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[\
+[{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[\
+{][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{\
+][0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{]\
+[0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][\
+0-9]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9\
+]*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]\
+*[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*\
+[]}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]\
+}][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}\
+][[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}]\
+[[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][\
+[{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[\
+{][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{\
+][[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{]\
+[[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][\
+[:digit:]]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]\
+]*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]\
+*[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*\
+[]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]\
+}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}\
+]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[]}]\
+}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[\
+[.].]}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]\
+}]}"
+: "${1#*[[{][0-9]*[]}][[{][[:digit:]]*[[.].]}]\
+}"
+
+: *[x[=[=][=]=]]; : [x[=]=][=[=]]*; : *[x[.[.][.].]]; : [x[.].][.[.]]*
+: *[[=[=]x[=]=]]; : [[=]=]x[=[=]]*; : *[[.[.]x[.].]]; : [[.].]x[.[.]]*
+: *[[=[=][=]=]x]; : [[=]=][=[=]x]*; : *[[.[.][.].]x]; : [[.].][.[.]x]*
+: [!]]; : [^]]; : [![]; : [^[]; : [!\]]; : [^\]]; : [!\[]; : [^\[]
+: [$'\x5b']; : [$'\x5d']; : []]; : [[]; : [\]]; : [\[]
+: [$'\x20'[]; : [" "[]; : [' '[]; : [\ []; : [\ \[]; : "${1#[ 	]}"
+: [[$'\x20']; : [[" "]; : [[' ']; : [[\ ]; : [\[\ ]; : "${1#[	 ]}"
+: [^$'\x20'[]; : [!" "[]; : [^' '[]; : [!\ []; : "${1#[^ 	]}"
+: [![$'\x20']; : [^[" "]; : [![' ']; : [^[\ ]; : "${1#[!	 ]}"
+
+nl='
+'
+echo "${1#${1%%[!"${nl}"]*}}"; echo "${1#${1%%[!'${nl}']*}}"
+echo "${1#${1%%[!\"${nl}]*}}"; echo "${1#${1%%[!\'${nl}]*}}"
+echo "${1#${1%%[!${nl}\"]*}}"; echo "${1#${1%%[!${nl}\']*}}"
+
+bins=(); bins=(0 1); eval bins+=({0..1})
+bins[0]=0; bins[1]=1; eval bins+=(\${bins[{1..0}]}); unset bins[3] bins[2]
+bins=([8#0]=$((2#100)) [$((8#1))]=$((2#10)) [3]=${bins[2#1]} ${bins[0]})
+(echo sum[$((bins[16#3] + bins[8#2] + bins[2#1] + bins[0]))])
+eval unset bins[{0..$((${#bins[*]} - 1))}]
+: