[racket] bug with TR type tooltips showing up where they shouldn't?

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Tue Mar 17 17:04:25 EDT 2015

I have noticed strange tooltips showing up today too. If you figure out to
make it happen in some smaller context that would be very helpful.


On Tuesday, March 17, 2015, Alexander D. Knauth <alexander at knauth.org>

> I’m not sure how to reliably reproduce it, but right now I have
> my-unpossible/main.rkt open in DrRacket, and strange type tooltips are
> appearing.
> my-unpossible/main.rkt is an untyped module, though it requires some typed
> modules.
> For example if I hover over line 8, column 1 (blank space) it shows the
> tooltip:
> (-> Real Integer)
> Integer
> And if I hover over line 8, columns 2-4, it shows:
> (-> Real Integer)
> If I hover over line 8, columns 5-6, it shows:
> (-> Pos (U Pos Dir) Pos (U Pos Dir) [#:normalize? Boolean] Affine)
> (-> Real Integer)
> And so on.
> If I close the window and open it again, they’re still there.
> When I quit DrRacket and restart it, they’re still there.
> And when I delete the compiled directory within the utils subdir, they’re
> still there.
> But I can’t seem to reproduce it with a simpler example.
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