26 lines
634 B
Racket
26 lines
634 B
Racket
#lang syndicate
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;; Illustrates a (now fixed) bug where mutation altering a
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;; subscription caused the `retracted` half of a during instance to be
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;; lost.
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;;
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;; Symptomatic output:
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;; x=123 v=999
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;; x=124 v=999
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;;
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;; Correct output:
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;; x=123 v=999
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;; x=124 v=999
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;; finally for x=124 v=999
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;;
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;; Should eventually be turned into some kind of test case.
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(struct foo (x y) #:prefab)
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(spawn (field [x 123])
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(assert (foo (x) 999))
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(during (foo (x) $v)
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(log-info "x=~a v=~a" (x) v)
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(when (= (x) 123) (x 124))
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(on-stop
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(log-info "finally for x=~a v=~a" (x) v))))
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