parse array ending in empty function (#5200)

Author: helixbass

lib/coffeescript/rewriter.js

@@ -618,7 +618,7 @@ exports.Rewriter = class Rewriter
         for j in [1..2] when @tag(i + j) in ['OUTDENT', 'TERMINATOR', 'FINALLY']
           tokens.splice i + j, 0, @indentation()...
           return 2 + j
-      if tag in ['->', '=>'] and (@tag(i + 1) is ',' or @tag(i + 1) is '.' and token.newLine)
+      if tag in ['->', '=>'] and (@tag(i + 1) in [',', ']'] or @tag(i + 1) is '.' and token.newLine)
         [indent, outdent] = @indentation tokens[i]
         tokens.splice i + 1, 0, indent, outdent
         return 1

src/rewriter.coffee

@@ -497,3 +497,10 @@ test "#4657: destructured array parameters", ->
 test "#5128: default parameters of function in binary operation", ->
   foo = yes or (a, b = {}) -> null
   eq foo, yes
+
+test "#5121: array end bracket after function glyph", ->
+  a = [->]
+  eq a.length, 1
+
+  b = [c: ->]
+  eq b.length, 1