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From: Per Bothner <>
To: "J. Vincent Toups" <>,
Subject: Re: Value of given type cannot be case to its own type.
Date: Wed, 10 Feb 2021 07:35:57 -0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 2/10/21 7:12 AM, J. Vincent Toups via Kawa wrote:
> I'm seeing this error:
> Value 'lib.mecs@131a7516' for variable 'm' has wrong type (lib.mecs)
> (lib.mecs cannot be cast to lib.mecs)
> Which on the face of things is kind of flabbergasting. The specific
> line of code which causes the issue suggests that it is indeed the
> case that the value lib.mecs@etc... is a lib.mecs instance and its
> being used as a lib.mecs instance.

We cannot possibly diagnose this without a test-case.

There are various possibilities.  The one that first comes to mind is a
class-loader problem: There are two classes named lib.mecs, loaded using
two different classloaders, and thus they are incompatible.  Though that
would be more likely to show up at run-time rather than compile-time.

It is also possible that one of the "lib.mecs" is not a reference to
an instance of the lib.mecs class (which would normally be the case), but
some type that the Kawa compiler displays as lib.mecs. Off-hand I can't
think of what that could be, but I would not be surprised to see that.
This could be a Kawa bug, of course.
	--Per Bothner

  reply	other threads:[~2021-02-10 15:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-10 15:12 J. Vincent Toups
2021-02-10 15:35 ` Per Bothner [this message]
     [not found]   ` <>
2021-02-10 16:38     ` Fwd: " J. Vincent Toups
2021-02-10 16:50       ` Per Bothner

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