July 2017 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Mysterious problem in loading Pharo

by Ben Coman

Maybe revew recent Windows 10 updates... http://www.sysprobs.com/how-to-view-installed-updates-on-windows-10-8-1-ser… cheers -ben On Sat, Jul 15, 2017 at 6:26 PM, PBKResearch <peter(a)pbkresearch.co.uk> wrote: > Hello > > > > I have a problem in loading Pharo images which, until yesterday, loaded > without difficulty. All the images showing the problem are Pharo 6 with the > Cog VM; older images do not seem to be affected. > > > > The first sign of a problem is that, as soon as I start the image, the > debug console appears, with several repeats of the message: > > LoadLibrary(FT2Plugin.dll) (998: Invalid access to memory location.) > > The other strange thing is that the appearance of some opened windows has > changed. Most obviously, the three icons at the top left (close, minimise, > expand) are very close together. Also, I think the print size has got a bit > smaller, though this is not obvious. > > > > I have recently reinstalled some components of Pharo and Moose, trying to > solve my problems with PunQLite, so I wondered if I had fouled something > up. To check, I made a completely new install of Pharo 6 (#60508) from the > Pharo download page in a separate folder. When I start the image, both the > strange things above are present, plus a debug window with the message; > âFT2 Error: Freetype2 primitive failedâ. > > > > So it looks as though something has happened to my system which means that > any Pharo 6 image will show these oddities. The images I have tried seem > able to run some of my functions correctly, so itâs all to do with > appearance. > > > > I am running on Windows 10 with all recent updates. There was a major > update of Windows late yesterday, so it may be that the problems appeared > then. Does anyone have any suggestions? > > > > Many thanks > > > > Peter Kenny >

July 15, 2017

Re: [Pharo-users] VoyageMongo with Metacello project spec in Pharo 6 on MacOS Sierra

by Esteban Lorenzano

Hi, > On 15 Jul 2017, at 13:46, Guillaume Giraud <guillaume.giraud(a)openmailbox.org> wrote: > > Hello, > > I placed this code in a baseline of my package: > > spec > project: 'VoyageMongo' > with: [ spec > className: #ConfigurationOfVoyageMongo; > version: #stable; > repository: 'github://pharo-nosql/voyage/mc'; > loads: #('mongo tests') ]. > > Unfortunately, when I load my Package from Pharo6 on MacOS Sierra I get the following error: > > Error: Unsupported OS platform > > The first lines of the stack are: > > BaselineOfPunQLite(Object) error: > BaselineOfPunQLite platformLibraryName > BaselineOfPunQLite preLoad > MetacelloMCVersionpec(MetacelloSpec) doItBlock: > > In detail: > > platformLibraryName > " Answer a name for the compiled version of the library " > > Smalltalk os isUnix ifTrue: [ ^ 'unqlite.so' ]. > Smalltalk os isWin32 ifTrue: [ ^ 'unqlite.dll' ]. > Smalltalk os isMacOSX ifTrue: [ ^ 'unqlite.dylib' ]. > > self error: 'Unsupported OS platformâ > > With Pharo6 on MacOsSierra, Â« Smalltalk os isMacOSX Â» return Â« false Â». But Â« Smalltalk os isMacOS Â» return Â« true Â». > > What can I do? I just need to load Voyage with the configuration of my package ? you can just change the Smalltalk os isMacOSX line for Smalltalk os isMacOS for the moment. now, thatâs very weird :) Whatâs the result of evaluating "Smalltalk osâ ? and after executing "OSPlatform startUp: true.â ? which VM are you using (Smalltalk vm version) ? and btw, is a lot better to make your config as this: spec baseline: 'Voyage' with: [ spec repository: 'github://pharo-nosql/voyage:1.5/mc'; loads: #('mongo tests') ]. (referring directly the baseline) cheers! Esteban > Thanks.

July 15, 2017

Re: [Pharo-users] Seamless - send collections by value

by Denis Kudriashov

Also try SeamlessLogger to profile remote communication: SeamlessLogger startAfresh All remote messages will be written into transcript. And you can analyze full statistics: SeamlessLogger collectStatistics inspect. 2017-07-14 14:04 GMT+02:00 Denis Kudriashov <dionisiydk(a)gmail.com>: > Hi Petr. > > There are few solutions to your problem. > > 1) You can specify #value strategy for any collections for your network > instance: > > > network transferByValue: (Kind of: Collection) > > For your example you need to apply this strategy on server side. In that > case client will continue send collections by reference but it will receive > collections by value from server. > > 2) You can specify value strategy for BlockClosure. It will perform > #select: (for example) on server side without requests to client. > > network transferByValue: (Instance of: BlockClosure) > > > Here you will need to apply strategy on client because blocks will be sent > from client to server. > > 3) You can explicitly pass objects with value strategy: > > YourService>>getPersons > > "on server side" > > ^retrievePersons asTransferredByValue > > > 4) If persons collection is instance variable of other transferred by > value object then you can specify what value means for this container: > > PersonContainer>>prepareValueTransferBy: aSeamlessObjectTransporter > > aSeamlessObjectTransporter transferByValue: contents > > > 5) You can ask any proxy to load local copy of remote object: > > proxy asLocalObject. > > > Important notice: > - Seamless has no distributed garbage collection. So if you will transfer > by reference temporary objects they will be not collected as garbage. For > example server could compute something and return it by reference. Nobody > will kill it. > But if you share only long lived service then it is not problem for you. > - there is no security in the level of Seamless. You should organize > secure channel by external tools like VPN. > > These features are in todo. > > Best regards, > Denis > > > 2017-07-13 18:21 GMT+02:00 Petr Fischer <petr.fischer(a)me.com>: > >> Hello, I am testing Seamless project (https://github.com/dionisiydk >> /Seamless) but I did not understand one thing: >> >> I have (for example) a Person class in my server and client image. Person >> class implements: >> >> Person>>sseamlessDefaultTransferStrategy >> ^SeamlessTransferStrategy defaultByValue >> >> so all Person instances are serialized from server to client image. Good. >> >> But when I have server method, for example, getPersons, that returns a >> collection (OrderedCollection) of Person instances, this collection is >> passed by reference (or not?). >> OrderedCollection inherits transfer strategy from Object, which is "by >> reference". >> >> So in client image, when I iterate this collection, too many (thousands) >> requests occurs. >> >> How to manage only this specific collection (returned from getPersons) to >> pass by value from server to client (to be completely serialized and copied >> to the client image), so when I iterate this collection in client image to >> avoid additional network requests (proxying)? >> >> Thanks! pf >> >> >

July 15, 2017

Re: [Pharo-users] Pharo 6.0 don't start

by Ben Coman

Nothing there jumps out at me, so just a general question... what other versions of Pharo have you successfully run on your system? Also, OSX 10.7.5 (September 19, 2012) is considered old (no longer support by Apple)... http://www.computerworld.com/article/2950580/operating-systems/the-end-is-n… so perhaps that could be related. cheers -ben On Tue, Jul 11, 2017 at 11:08 PM, Trussardi Dario Romano < dario.trussardi(a)tiscali.it> wrote: > Ciao, > > I'm interested to understund how git support work in Pharo. > > i download and unzip Pharo 6.0 from http://files.pharo.org/ > platform/Pharo6.0-mac.zip > > Now when i open the application on the desktop the system open a dialog > with : Pharo 6.0 it closed unexpectedly. > > > The relative information are: > > Process: launchd [75184] > > Path: /Users/USER/Desktop/Pharo6.0.app/Contents/MacOS/Pharo > > Identifier: org.pharo.Pharo > > Version: ??? (???) > > Code Type: X86 (Native) > > Parent Process: launchd [178] > > > > Date/Time: 2017-07-11 16:40:23.605 +0200 > > OS Version: Mac OS X 10.7.5 (11G63b) > > Report Version: 9 > > > > Interval Since Last Report: 33830084 sec > > Crashes Since Last Report: 465 > > Per-App Crashes Since Last Report: 30 > > Anonymous UUID: E84D2E1F-939E-4486-AF79-68ABE2A5AAB9 > > > > Crashed Thread: Unknown > > Exception Type: EXC_BAD_ACCESS (SIGSEGV) > > Exception Codes: KERN_INVALID_ADDRESS at 0x000000008fe01030 > > Backtrace not available > > Unknown thread crashed with X86 Thread State (32-bit): > > eax: 0x00000000 ebx: 0x00000000 ecx: 0x00000000 edx: 0x00000000 > > edi: 0x00000000 esi: 0x00000000 ebp: 0x00000000 esp: 0x00000000 > > > ss: 0x00000023 efl: 0x00010202 eip: 0x8fe01030 cs: 0x0000001b > > > > ds: 0x00000023 es: 0x00000023 fs: 0x00000000 gs: 0x00000000 > > > > cr2: 0x8fe01030 > > Logical CPU: 0 > > Binary images description not available > > External Modification Summary: > > Calls made by other processes targeting this process: > > > > task_for_pid: 1 > > > > thread_create: 0 > > > > thread_set_state: 0 > > > > Calls made by this process: > > > > task_for_pid: 0 > > > > thread_create: 0 > > > > thread_set_state: 0 > > > > Calls made by all processes on this machine: > > > > task_for_pid: 140939 > > > > thread_create: 0 > > > thread_set_state: 0 > > Model: MacBookPro5,2, BootROM MBP52.008E.B05, 2 processors, Intel Core 2 > Duo, 2.8 GHz, 8 GB, SMC 1.42f4 > > Graphics: NVIDIA GeForce 9600M GT, NVIDIA GeForce 9600M GT, PCIe, 512 MB > > Graphics: NVIDIA GeForce 9400M, NVIDIA GeForce 9400M, PCI, 256 MB > > Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x830B, > 0x4D3253344736344342384847354E2D424520 > > Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x830B, > 0x4D3253344736344342384847354E2D424520 > > AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), > Broadcom BCM43xx 1.0 (5.106.198.19.22) > > Bluetooth: Version 4.0.8f17, 2 service, 11 devices, 3 incoming serial ports > > Network Service: Ethernet, Ethernet, en0 > > Network Service: AirPort, AirPort, en1 > > Serial ATA Device: Hitachi HTS545050B9SA02, 500,11 GB > > Serial ATA Device: HL-DT-ST DVDRW GS21N > > USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0x24400000 / 2 > > USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, > 0x04600000 / 3 > > USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2 > > USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2 > > USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8217, > 0x06110000 / 5 > > Thanks for considerations, > > Dario >

July 15, 2017

Re: [Pharo-users] Mysterious problem in loading Pharo

by PBKResearch

Hello Just a bit of supplementary information. Examining the 'Settings' option, I see that freetype is shown as not available, 'probably because the FT2Plugin is not installed'. Well the plugin is installed, but evidently the VM can't locate it. Should I try to reinstall it? If so, where from? Thanks Peter Kenny From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of PBKResearch Sent: 15 July 2017 11:26 To: pharo-users(a)lists.pharo.org Subject: [Pharo-users] Mysterious problem in loading Pharo Hello I have a problem in loading Pharo images which, until yesterday, loaded without difficulty. All the images showing the problem are Pharo 6 with the Cog VM; older images do not seem to be affected. The first sign of a problem is that, as soon as I start the image, the debug console appears, with several repeats of the message: LoadLibrary(FT2Plugin.dll) (998: Invalid access to memory location.) The other strange thing is that the appearance of some opened windows has changed. Most obviously, the three icons at the top left (close, minimise, expand) are very close together. Also, I think the print size has got a bit smaller, though this is not obvious. I have recently reinstalled some components of Pharo and Moose, trying to solve my problems with PunQLite, so I wondered if I had fouled something up. To check, I made a completely new install of Pharo 6 (#60508) from the Pharo download page in a separate folder. When I start the image, both the strange things above are present, plus a debug window with the message; 'FT2 Error: Freetype2 primitive failed'. So it looks as though something has happened to my system which means that any Pharo 6 image will show these oddities. The images I have tried seem able to run some of my functions correctly, so it's all to do with appearance. I am running on Windows 10 with all recent updates. There was a major update of Windows late yesterday, so it may be that the problems appeared then. Does anyone have any suggestions? Many thanks Peter Kenny

July 15, 2017

VoyageMongo with Metacello project spec in Pharo 6 on MacOS Sierra

by Guillaume Giraud

Hello, I placed this code in a baseline of my package: spec project: 'VoyageMongo' with: [ spec className: #ConfigurationOfVoyageMongo; version: #stable; repository: 'github://pharo-nosql/voyage/mc'; loads: #('mongo tests') ]. Unfortunately, when I load my Package from Pharo6 on MacOS Sierra I get the following error: Error: Unsupported OS platform The first lines of the stack are: BaselineOfPunQLite(Object) error: BaselineOfPunQLite platformLibraryName BaselineOfPunQLite preLoad MetacelloMCVersionpec(MetacelloSpec) doItBlock: In detail: platformLibraryName " Answer a name for the compiled version of the library " Smalltalk os isUnix ifTrue: [ ^ 'unqlite.so' ]. Smalltalk os isWin32 ifTrue: [ ^ 'unqlite.dll' ]. Smalltalk os isMacOSX ifTrue: [ ^ 'unqlite.dylib' ]. self error: 'Unsupported OS platformâ With Pharo6 on MacOsSierra, Â« Smalltalk os isMacOSX Â» return Â« false Â». But Â« Smalltalk os isMacOS Â» return Â« true Â». What can I do? I just need to load Voyage with the configuration of my package ? Thanks.

July 15, 2017

Mysterious problem in loading Pharo

by PBKResearch

Hello I have a problem in loading Pharo images which, until yesterday, loaded without difficulty. All the images showing the problem are Pharo 6 with the Cog VM; older images do not seem to be affected. The first sign of a problem is that, as soon as I start the image, the debug console appears, with several repeats of the message: LoadLibrary(FT2Plugin.dll) (998: Invalid access to memory location.) The other strange thing is that the appearance of some opened windows has changed. Most obviously, the three icons at the top left (close, minimise, expand) are very close together. Also, I think the print size has got a bit smaller, though this is not obvious. I have recently reinstalled some components of Pharo and Moose, trying to solve my problems with PunQLite, so I wondered if I had fouled something up. To check, I made a completely new install of Pharo 6 (#60508) from the Pharo download page in a separate folder. When I start the image, both the strange things above are present, plus a debug window with the message; 'FT2 Error: Freetype2 primitive failed'. So it looks as though something has happened to my system which means that any Pharo 6 image will show these oddities. The images I have tried seem able to run some of my functions correctly, so it's all to do with appearance. I am running on Windows 10 with all recent updates. There was a major update of Windows late yesterday, so it may be that the problems appeared then. Does anyone have any suggestions? Many thanks Peter Kenny

July 15, 2017

Re: [Pharo-users] Fwd: How does instant update work in Pharo?

by Offray Vladimir Luna CÃ¡rdenas

Thanks a lot Ben. I'll share this thread, now that have your answers in the Leo list. Cheers, Offray On 15/07/17 04:40, Ben Coman wrote: > > > On Fri, Jul 7, 2017 at 10:50 PM, Offray Vladimir Luna CÃ¡rdenas > <offray.luna(a)mutabit.com <mailto:offray.luna@mutabit.com>> wrote: > > Hi, > > Grafoscopio brings inspiration from IPython/Jupyter[1][2], Leo > and, of course, Pharo/Smalltalk (among others). Recently Edward > Ream, the main force behind Leo, asked my about the internals of > Pharo and I would like to give him a better answer that the one I > gave[4] with pointers to detailed literature. > > [1] http://ipython.org/ > [2] http://jupyter.org/ > [3] http://leoeditor.com/ > [4] https://groups.google.com/forum/#!topic/leo-editor/rYF21GxraT4 > <https://groups.google.com/forum/#%21topic/leo-editor/rYF21GxraT4> > > So, any details on the following question will be appreciated. > > Cheers, > > Offray > > -------- Forwarded Message -------- > Subject: How does instant update work in Pharo? > Date: Fri, 7 Jul 2017 03:23:21 -0700 (PDT) > From: Edward K. Ream <edreamleo(a)gmail.com> > <mailto:edreamleo@gmail.com> > Reply-To: leo-editor(a)googlegroups.com > <mailto:leo-editor@googlegroups.com> > To: leo-editor <leo-editor(a)googlegroups.com> > <mailto:leo-editor@googlegroups.com> > > > > I'm beginning to wonder what the difference is between the Pharo > way and #511: reload-leo command. > <https://github.com/leo-editor/leo-editor/issues/511> > > How does Pharo handle changes in object format? > > > https://gbracha.blogspot.com.au/2009/07/miracle-of-become.html > http://www.mirandabanda.org/cogblog/2013/09/13/lazy-become-and-a-partial-re… > http://fast.org.ar/live/wp-content/uploads/2015/10/ClementBera-Efficient-su… > https://hal.inria.fr/hal-01152610/document > > > > or methods? > > > https://clementbera.wordpress.com/2013/08/09/the-cog-vm-lookup/ > > > > How does Pharo recover from crashes due to changed method signatures > > > "crash" is quite a loaded term. We "never" ;) crash due to > application code changes. We only get "crashes" from defects in the > VM. What we do get are lockups from damaging the UI loop with never > completing loops or a swarm of debuggers appearing across the screen > each UI cycle. > > You would need to clarify what is meant by "method signature". It > sounds like he may be referring to argument typing. Our method > arguments are not typed, so there are no method signature changes, > thus its NotAProblem(tm). Now to be clear, this doesn't mean > Smalltalk is weakly-typed. Smalltalk is strong-typed. Each object > absolutely knows its type and what message it can respond to. We just > don't type variables. i.e. we have late-bound dynamic type checking > rather than compile time static type checking, which works well for us. > > > , invalid calls, etc? > > > Search for "doesNotUnderstand" in these references... > https://marianopeck.wordpress.com/2011/04/30/smalltalk-reflective-model/ > http://www.mirandabanda.org/bluebook/bluebook_chapter27.html > https://stackoverflow.com/questions/3102695/what-are-the-key-differences-be… > http://wiki.c2.com/?DoesNotUnderstand > > But the best way to understand how it works is to observe it. In a > playground, select the following... > 1 xxxxx > and choose [debug It] from the context men, then <Step Into> every > line of code until the debugger window "Instance of nil did not > understand #xxxxx" appears. Although the first time through you may > want to <Step Over> #findContextSuchThat: and #printString. > > Although I'm curious why it says "Instance of nil did not...." rather > than "Instance of SmallInteger did not..." > > cheers -ben > >

July 15, 2017

Re: [Pharo-users] Fwd: How does instant update work in Pharo?

by Ben Coman

On Fri, Jul 7, 2017 at 10:50 PM, Offray Vladimir Luna CÃ¡rdenas < offray.luna(a)mutabit.com> wrote: > Hi, > > Grafoscopio brings inspiration from IPython/Jupyter[1][2], Leo and, of > course, Pharo/Smalltalk (among others). Recently Edward Ream, the main > force behind Leo, asked my about the internals of Pharo and I would like to > give him a better answer that the one I gave[4] with pointers to detailed > literature. > [1] http://ipython.org/ > [2] http://jupyter.org/ > [3] http://leoeditor.com/ > [4] https://groups.google.com/forum/#!topic/leo-editor/rYF21GxraT4 > > So, any details on the following question will be appreciated. > > Cheers, > > Offray > > -------- Forwarded Message -------- > Subject: How does instant update work in Pharo? > Date: Fri, 7 Jul 2017 03:23:21 -0700 (PDT) > From: Edward K. Ream <edreamleo(a)gmail.com> <edreamleo(a)gmail.com> > Reply-To: leo-editor(a)googlegroups.com > To: leo-editor <leo-editor(a)googlegroups.com> <leo-editor(a)googlegroups.com> > > I'm beginning to wonder what the difference is between the Pharo way and #511: > reload-leo command. <https://github.com/leo-editor/leo-editor/issues/511> > > How does Pharo handle changes in object format? > https://gbracha.blogspot.com.au/2009/07/miracle-of-become.html http://www.mirandabanda.org/cogblog/2013/09/13/lazy-become-and-a-partial-re… http://fast.org.ar/live/wp-content/uploads/2015/10/ClementBera-Efficient-su… https://hal.inria.fr/hal-01152610/document > or methods? > https://clementbera.wordpress.com/2013/08/09/the-cog-vm-lookup/ > How does Pharo recover from crashes due to changed method signatures > "crash" is quite a loaded term. We "never" ;) crash due to application code changes. We only get "crashes" from defects in the VM. What we do get are lockups from damaging the UI loop with never completing loops or a swarm of debuggers appearing across the screen each UI cycle. You would need to clarify what is meant by "method signature". It sounds like he may be referring to argument typing. Our method arguments are not typed, so there are no method signature changes, thus its NotAProblem(tm). Now to be clear, this doesn't mean Smalltalk is weakly-typed. Smalltalk is strong-typed. Each object absolutely knows its type and what message it can respond to. We just don't type variables. i.e. we have late-bound dynamic type checking rather than compile time static type checking, which works well for us. > , invalid calls, etc? > Search for "doesNotUnderstand" in these references... https://marianopeck.wordpress.com/2011/04/30/smalltalk-reflective-model/ http://www.mirandabanda.org/bluebook/bluebook_chapter27.html https://stackoverflow.com/questions/3102695/what-are-the-key-differences-be… http://wiki.c2.com/?DoesNotUnderstand But the best way to understand how it works is to observe it. In a playground, select the following... 1 xxxxx and choose [debug It] from the context men, then <Step Into> every line of code until the debugger window "Instance of nil did not understand #xxxxx" appears. Although the first time through you may want to <Step Over> #findContextSuchThat: and #printString. Although I'm curious why it says "Instance of nil did not...." rather than "Instance of SmallInteger did not..." cheers -ben

July 15, 2017

Re: [Pharo-users] Glamour: update presenter with new text

by Hilaire

Thanks for the updates on both the internal dependencies and the ListPresentation. >From this browser, I deduced a second simpler browser for only one script. It was easy to do so thanks to your tips (attached pic). With this simpler script editor, when I open a script, I like it opens on the compute method, because it is a mandatory method in a script. I was doing it like browser := Nautilus openOnClass: scriptClass selector: #compute. I guess, there is a way to do so with the Glamour browser ? Thanks Hilaire -- Dr. Geo http://drgeo.eu

July 15, 2017