Fix Expr conversion of erroneous operator dot call (#374)

Author: Liozou

src/expr.jl

@@ -251,13 +251,16 @@ function _internal_node_to_Expr(source, srcrange, head, childranges, childheads,
         # Move parameters blocks to args[2]
         _reorder_parameters!(args, 2)
         if headsym === :dotcall
+            funcname = args[1]
             if is_prefix_call(head)
                 headsym = :.
-                args = Any[args[1], Expr(:tuple, args[2:end]...)]
+                args = Any[funcname, Expr(:tuple, args[2:end]...)]
             else
                 # operator calls
                 headsym = :call
-                args[1] = Symbol(".", args[1])
+                if funcname isa Symbol
+                    args[1] = Symbol(:., funcname)
+                end # else funcname could be an Expr(:error), just propagate it
             end
         end
     elseif k == K"." && length(args) == 1 && is_operator(childheads[1])

test/expr.jl

@@ -428,6 +428,9 @@
         @test parsestmt("f(.+)")   == Expr(:call, :f, Expr(:., :+))
         @test parsestmt("(a, .+)") == Expr(:tuple, :a, Expr(:., :+))
         @test parsestmt("A.:.+")   == Expr(:., :A, QuoteNode(Symbol(".+")))
+
+        # Issue #341
+        @test parsestmt("./x", ignore_errors=true) == Expr(:call, Expr(:error, Expr(:., :/)), :x)
     end
 
     @testset "let" begin