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 <gust...@oma.org.ar> 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 <sdmo...@fas.harvard.edu > <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 > > (matth...@ccs.neu.edu <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 racket-users+unsubscr...@googlegroups.com <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 racket-users+unsubscr...@googlegroups.com <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 racket-users+unsubscr...@googlegroups.com <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 racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
