fix empty catch handling

Author: pfitzseb

src/components/keywords.jl

@@ -413,7 +413,7 @@ function parse_try(ps::ParseState)
     # else block
     if kindof(ps.nt) === Tokens.ELSE
         if isempty(catchblock.args)
-            args[3] = EXPR(:FALSE, 0, 0, "")
+            args[3] = EXPR(:block, 0, 0, "")
         end
         else_trivia = EXPR(next(ps))
         else_arg = EXPR(:block, parse_block(ps, EXPR[], (Tokens.FINALLY,Tokens.END)))
@@ -423,7 +423,7 @@ function parse_try(ps::ParseState)
     if kindof(ps.nt) === Tokens.FINALLY
         has_finally = true
         if isempty(catchblock.args)
-            args[3] = EXPR(:FALSE, 0, 0, "")
+            args[3] = EXPR(:block, 0, 0, "")
         end
         push!(trivia, EXPR(next(ps)))
         push!(args, EXPR(:block, parse_block(ps)))

test/parser.jl

@@ -635,6 +635,13 @@ end
                     stop(f)
                 end
                 """ |> test_expr
+                @test """try
+                    f(1)
+                catch
+                else
+                    stop(f)
+                end
+                """ |> test_expr
                 @test """try
                     f(1)
                 catch err
@@ -645,6 +652,13 @@ end
                     foo
                 end
                 """ |> test_expr
+                # the most useless try catch ever:
+                @test """try
+                catch
+                else
+                finally
+                end
+                """ |> test_expr
             end
         end
         @testset "For" begin