Ticket #343 (closed defect: fixed)

Opened 4 years ago

Last modified 4 years ago

A field and property that differ only by case of a type with the same name triggers an internal compiler error

Reported by: nerdzero Owned by:
Priority: major Milestone:
Component: Cobra Compiler Version: 0.9.4
Keywords: ide, monodevelop Cc:


MonoDevelop recently made this change:

It adds a field called "diffTracker" of type "DiffTracker?" and a property called "DiffTracker?" also of type "DiffTracker?". This triggers a duplicate key exception in Container.addDecl when reading the MonoDevelop library.

This prevents compilation of the Cobra addin for MD/XS. Sad face.

Here's part of the stack trace:

Unhandled Exception:
System.ArgumentException: An element with the same key already exists in the dictionary.
  at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (System.Collections.Generic.TKey key, System.Collections.Generic.TValue value) [0x00000] in <filename unknown>:0 
  at Container`1[IBoxMember].AddDecl (IBoxMember decl) [0x00000] in <filename unknown>:0 
  at Box._scanClrProperties () [0x00000] in <filename unknown>:0 
  at Class.ScanNativeTypeClr () [0x00000] in <filename unknown>:0 
  at ClrBackEnd.ScanNativeType (Box box) [0x00000] in <filename unknown>:0 
  at Box._scanNativeType () [0x00000] in <filename unknown>:0 
  at Box._bindInh () [0x00000] in <filename unknown>:0 
  at ClassOrStruct._bindInh () [0x00000] in <filename unknown>:0 
  at Node.BindInh () [0x00000] in <filename unknown>:0 
  at Box.BindInh () [0x00000] in <filename unknown>:0 
  at Box.__prepLibraryInh () [0x00000] in <filename unknown>:0 
  at Box._prepLibraryInh () [0x00000] in <filename unknown>:0 
  at Box._prepLibraryBox () [0x00000] in <filename unknown>:0 
  at Box.PrepIfNeeded () [0x00000] in <filename unknown>:0 
  at Box.__memberForName (System.String name) [0x00000] in <filename unknown>:0 
  at Box.__memberForNameIncludingExtensions (System.String name) [0x00000] in <filename unknown>:0 
  at Box.MemberForName (System.String name) [0x00000] in <filename unknown>:0 
  at Class.MemberForName (System.String name) [0x00000] in <filename unknown>:0 
  at NameExpr.MemberForName (System.String name) [0x00000] in <filename unknown>:0 
  at CallExpr._bindImp () [0x00000] in <filename unknown>:0 
  at Node.BindImp () [0x00000] in <filename unknown>:0 
  at Stmt.BindImp () [0x00000] in <filename unknown>:0

Change History

Changed 4 years ago by Charles

I'll take a look.

Changed 4 years ago by Charles

I tried to recreate this like so:

// Lib.cs
using System;

namespace Lib {
	public class Foo {
		protected int bar;
		public int Bar {
			get { return bar; }
			set { bar = value; }


mcs -t:library Lib.cs
use Lib

class P

    def main
        trace Foo
        f = Foo()
        trace = 2
        assert == 2
        print 'done.'

And it works fine:

    trace : Foo=Lib.Foo (MonoType)
          - at use-lib.cobra:7
          - in P.main

    trace :
          - at use-lib.cobra:9
          - in P.main

    trace :
          - at use-lib.cobra:12
          - in P.main

Could it be something else?

Changed 4 years ago by Charles

Nevermind. Got it. Both members have to be public.

Changed 4 years ago by Charles

Fixed. Running tests.

Changed 4 years ago by Charles

  • status changed from new to closed
  • resolution set to fixed

Fixed in changeset:3020

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