Fix intermittent universe-restart.rkt DrDr failure#252
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mfelleisen merged 1 commit intoracket:masterfrom Jan 22, 2026
Merged
Fix intermittent universe-restart.rkt DrDr failure#252mfelleisen merged 1 commit intoracket:masterfrom
mfelleisen merged 1 commit intoracket:masterfrom
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Handle network errors in broadcast when universe drops a world. Example: https://drdr.racket-lang.org/71877/racket/share/pkgs/htdp-test/2htdp/tests/universe-restart.rkt
mfelleisen
reviewed
Jan 22, 2026
| (when *out* | ||
| (check-result 'send sexp? "Sexp expected; given ~e\n" msg) | ||
| (tcp-send *out* msg))) | ||
| (with-handlers ([exn:fail:network? (lambda (e) (set! *out* #f))]) |
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Handle network errors in
broadcastwhen universe drops a world.When a universe drops a world by closing the TCP connection, subsequent attempts by the world to send messages would raise a "Broken pipe" error. This caused intermittent test failures in
universe-restart.rkt.The fix catches
exn:fail:network?in thebroadcastfunction and sets*out*to#f, preventing the exception from propagating.Example failure: https://drdr.racket-lang.org/71877/racket/share/pkgs/htdp-test/2htdp/tests/universe-restart.rkt