[racket-dev] Installing Optimization Coach broke Racket's reader

Ran this program:

#lang racket
(require planet2)
(install "optimization-coach")

Realized setup was running on one thread, stopped program, closed DrRacket.

Figured Optimization Coach must have been downloaded already, so I ran 
setup:

$ ./raco setup

Everything appeared to work. Started DrRacket:

$ ./drracket &

Got this error on startup:

DrRacket:module-language.rkt:first-opened exn: link: bad variable linkage;
reference to a variable that has the wrong procedure or structure-type shape
reference phase level: 0
variable module: "/home/neil/plt/collects/syntax/module-reader.rkt"
variable phase: 0
reference in module: "/home/neil/plt/collects/racket/lang/reader.rkt"
(|[running body]| . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/lang/reader.rkt> #f #f #f #f))
(call-with-limits . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/sandbox.rkt> 358 0 14429 1724))
(call-with-custodian-shutdown . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/sandbox.rkt> 406 0 16321 316))
(call-with-break-parameterization . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/private/more-scheme.rkt> 146 2 
4832 517))
(loop . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/sandbox.rkt> 763 5 32166 1584))
(#f . #(struct:srcloc 
#<path:/home/neil/plt/collects/mred/private/wx/common/queue.rkt> 451 6 
19918 1056))
(#f . #(struct:srcloc 
#<path:/home/neil/plt/collects/mred/private/wx/common/queue.rkt> 502 32 
21905 120))
(call-with-break-parameterization . #(struct:srcloc 
#<path:/home/neil/plt/collects/racket/private/more-scheme.rkt> 146 2 
4832 517))
(loop . #(struct:srcloc 
#<path:/home/neil/plt/collects/mred/private/wx/common/queue.rkt> 397 18 
17838 540))

But DrRacket still worked. Okay... ran the default program ("#lang 
racket"), got this output:

Module Language: invalid module text
link: bad variable linkage;
reference to a variable that has the wrong procedure or structure-type shape
reference phase level: 0
variable module: "/home/neil/plt/collects/syntax/module-reader.rkt"
variable phase: 0
reference in module: "/home/neil/plt/collects/racket/lang/reader.rkt" 
in: wrap-internal

Just did "raco setup -c" and "raco setup", waiting for completion.

Any idea what broke?

Neil ⊥