3 files changed, 35 insertions, 1 deletions

diff --git a/src/nvim/testdir/test_alot.vim b/src/nvim/testdir/test_alot.vim
index 30b8a9ceb8..daf6f026ba 100644
--- a/src/nvim/testdir/test_alot.vim
+++ b/src/nvim/testdir/test_alot.vim
@@ -6,4 +6,5 @@ source test_cursor_func.vim
 source test_cmdline.vim
 source test_menu.vim
 source test_popup.vim
+source test_regexp_utf8.vim
 source test_unlet.vim
diff --git a/src/nvim/testdir/test_regexp_utf8.vim b/src/nvim/testdir/test_regexp_utf8.vim
new file mode 100644
index 0000000000..e1b1c2a9fb
--- /dev/null
+++ b/src/nvim/testdir/test_regexp_utf8.vim
@@ -0,0 +1,33 @@
+" Tests for regexp in utf8 encoding
+scriptencoding utf-8
+
+func s:equivalence_test()
+  let str = "AÀÁÂÃÄÅĀĂĄǍǞǠẢ BḂḆ CÇĆĈĊČ DĎĐḊḎḐ EÈÉÊËĒĔĖĘĚẺẼ FḞ GĜĞĠĢǤǦǴḠ HĤĦḢḦḨ IÌÍÎÏĨĪĬĮİǏỈ JĴ KĶǨḰḴ LĹĻĽĿŁḺ MḾṀ NÑŃŅŇṄṈ OÒÓÔÕÖØŌŎŐƠǑǪǬỎ PṔṖ Q RŔŖŘṘṞ SŚŜŞŠṠ TŢŤŦṪṮ UÙÚÛÜŨŪŬŮŰŲƯǓỦ VṼ WŴẀẂẄẆ XẊẌ YÝŶŸẎỲỶỸ ZŹŻŽƵẐẔ aàáâãäåāăąǎǟǡả bḃḇ cçćĉċč dďđḋḏḑ eèéêëēĕėęěẻẽ fḟ gĝğġģǥǧǵḡ hĥħḣḧḩẖ iìíîïĩīĭįǐỉ jĵǰ kķǩḱḵ lĺļľŀłḻ mḿṁ nñńņňʼnṅṉ oòóôõöøōŏőơǒǫǭỏ pṕṗ q rŕŗřṙṟ sśŝşšṡ tţťŧṫṯẗ uùúûüũūŭůűųưǔủ vṽ wŵẁẃẅẇẘ xẋẍ yýÿŷẏẙỳỷỹ zźżžƶẑẕ"
+  let groups = split(str)
+  for group1 in groups
+    for c in split(group1, '\zs')
+      " next statement confirms that equivalence class matches every
+      " character in group
+      call assert_match('^[[=' . c . '=]]*$', group1)
+      for group2 in groups
+        if group2 != group1
+          " next statement converts that equivalence class doesn't match
+          " character in any other group
+          call assert_equal(-1, match(group2, '[[=' . c . '=]]'))
+        endif
+      endfor
+    endfor
+  endfor
+endfunc
+
+func Test_equivalence_re1()
+  set re=1
+  call s:equivalence_test()
+  set re=0
+endfunc
+
+func Test_equivalence_re2()
+  set re=2
+  call s:equivalence_test()
+  set re=0
+endfunc
diff --git a/src/nvim/version.c b/src/nvim/version.c
index 1cb8d128aa..9e3cea069c 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -577,7 +577,7 @@ static int included_patches[] = {
   1703,
   // 1702,
   // 1701,
-  // 1700,
+  1700,
   // 1699,
   // 1698 NA
   // 1697,