It is probably best of all modifications to the gui objects happen on the eventspace main thread.
Robby On Thursday, February 11, 2016, Gustavo Massaccesi <[email protected]> wrote: > I've seen similar errors many times too (perhaps it's more common in > my machine that is slow and has windows ...) > > Once I tracked it, but I never got enough details to fix it. It was a > few months ago, ... Perhaps it was another error, .... In case this is > useful ... > > IIRC the problem is that two threads try to unlock-modify-lock the > editor. There is some wrapper that saves and restore the lock state. > The idea is that this work: > > unlock1-modify1-unlock2-modify2-lock2-modify1-lock1 > > As unlock2 sees that the editor is already unlocked, lock2 does not > lock the editor and modify1 is ok > > For some reason, sometimes this is executed as > > unlock1-modify1-unlock2-modify1-lock1-modify2-lock2 > > As unlock1 sees that the editor is locked, lock1 locks the editor and > modify2 generates an error. > > Gustavo > > > On Thu, Feb 11, 2016 at 1:37 PM, Scott Moore <[email protected] > <javascript:;>> wrote: > > Yes, around 80% of the time if I disable macro hiding, and sometimes even > > with macro hiding if I’m moving back and forth through a long sequence of > > steps. > > > > I had been meaning to file a report... > > > > On February 11, 2016 at 11:27:21 AM, Matthias Felleisen > > ([email protected] <javascript:;>) wrote: > > > > > > ... has anyone seen this error message from stepping thru macros: > > > > [:~/svn/2HtDP] matthias% sequence-contract-violation: negative: method > > set-max-width cannot be called, except in states (unlocked write-lock), > args > > 834 > > context...: > > /Users/matthias/plt/racket/collects/racket/private/more-scheme.rkt:148:2: > > call-with-break-parameterization > > /Users/matthias/plt/racket/share/pkgs/gui-lib/mred/private/lock.rkt:43:38 > > /Users/matthias/plt/racket/collects/racket/private/more-scheme.rkt:265:2: > > call-with-exception-handler > > > /Users/matthias/plt/racket/share/pkgs/gui-lib/mred/private/wxme/text.rkt:766:2: > > end-edit-sequence method in text% > > > /Users/matthias/plt/racket/share/pkgs/macro-debugger/macro-debugger/view/stepper.rkt:438:4: > > update* method in macro-stepper-widget% > > > /Users/matthias/plt/racket/share/pkgs/macro-debugger/macro-debugger/view/stepper.rkt:400:31 > > .../more-scheme.rkt:261:28 > > > /Users/matthias/plt/racket/share/pkgs/macro-debugger/macro-debugger/view/stepper.rkt:369:24 > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected] <javascript:;>. > > For more options, visit https://groups.google.com/d/optout. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected] <javascript:;>. > > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:;>. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
