Vm-dev October 2018

vm-dev@lists.squeakfoundation.org

36 participants
189 discussions

VM Maker: VMMaker.oscog-cb.2445.mcz
by commits＠source.squeak.org 02 Oct '18

02 Oct '18

ClementBera uploaded a new version of VMMaker to project VM Maker: http://source.squeak.org/VMMaker/VMMaker.oscog-cb.2445.mcz ==================== Summary ==================== Name: VMMaker.oscog-cb.2445 Author: cb Time: 2 October 2018, 2:59:39.047824 pm UUID: 8c661cb0-900c-4f0c-a9c0-219333c2e224 Ancestors: VMMaker.oscog-eem.2444 Change the objStack logic to mmap a new memory segment on overflow if not enough room on heap when allocating a new page. Happened to me reliably on ~20Gb heap that the mark stack would overflow without enough space on heap during marking to allocate a new page. This code fixed the bug. =============== Diff against VMMaker.oscog-eem.2444 =============== Item was changed: ----- Method: SpurMemoryManager>>ensureRoomOnObjStackAt: (in category 'obj stacks') ----- ensureRoomOnObjStackAt: objStackRootIndex "An obj stack is a stack of objects stored in a hidden root slot, such as the markStack or the ephemeronQueue. It is a linked list of segments, with the hot end at the head of the list. It is a word object. The stack pointer is in ObjStackTopx and 0 means empty. The list goes through ObjStackNextx. We don't want to shrink objStacks, since they're used in GC and its good to keep their memory around. So unused pages created by popping emptying pages are kept on the ObjStackFreex list." | stackOrNil freeOrNewPage | stackOrNil := self fetchPointer: objStackRootIndex ofObject: hiddenRootsObj. (stackOrNil = nilObj or: [(self fetchPointer: ObjStackTopx ofObject: stackOrNil) >= ObjStackLimit]) ifTrue: [freeOrNewPage := stackOrNil = nilObj ifTrue: [0] ifFalse: [self fetchPointer: ObjStackFreex ofObject: stackOrNil]. freeOrNewPage ~= 0 ifTrue: "the free page list is always on the new page." [self storePointer: ObjStackFreex ofObjStack: stackOrNil withValue: 0. self assert: (marking not or: [self isMarked: freeOrNewPage])] ifFalse: [freeOrNewPage := self allocateSlotsInOldSpace: ObjStackPageSlots format: self wordIndexableFormat classIndex: self wordSizeClassIndexPun. + freeOrNewPage ifNil: + ["Allocate a new segment an retry. This is very uncommon. But it happened to me (Clement)." + self growOldSpaceByAtLeast: ObjStackPageSlots. + freeOrNewPage := self allocateSlotsInOldSpace: ObjStackPageSlots + format: self wordIndexableFormat + classIndex: self wordSizeClassIndexPun. + freeOrNewPage ifNil: [self error: 'no memory to allocate or extend obj stack']]. - freeOrNewPage ifNil: [self error: 'no memory to allocate or extend obj stack']. self storePointer: ObjStackFreex ofObjStack: freeOrNewPage withValue: 0. marking ifTrue: [self setIsMarkedOf: freeOrNewPage to: true]]. self storePointer: ObjStackMyx ofObjStack: freeOrNewPage withValue: objStackRootIndex; storePointer: ObjStackNextx ofObjStack: freeOrNewPage withValue: (stackOrNil = nilObj ifTrue: [0] ifFalse: [stackOrNil]); storePointer: ObjStackTopx ofObjStack: freeOrNewPage withValue: 0; storePointer: objStackRootIndex ofObject: hiddenRootsObj withValue: freeOrNewPage. self assert: (self isValidObjStackAt: objStackRootIndex). "Added a new page; now update and answer the relevant cached first page." stackOrNil := self updateRootOfObjStackAt: objStackRootIndex with: freeOrNewPage]. self assert: (self isValidObjStackAt: objStackRootIndex). ^stackOrNil!

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Errored: OpenSmalltalk/opensmalltalk-vm#1424 (Cog - 76759fb)
by Travis CI 02 Oct '18

02 Oct '18

Build Update for OpenSmalltalk/opensmalltalk-vm ------------------------------------- Build: #1424 Status: Errored Duration: 1 hr, 0 mins, and 24 secs Commit: 76759fb (Cog) Author: Eliot Miranda Message: Revert the changes to the BitBltPlugin in VMMaker.oscog-eem.2445. This is not ready for prime time yet and has moved to the VMMakerInboRevert the changes to the BitBltPlugin in VMMaker.oscog-eem.2445. This is not ready for prime time yet and has moved to the VMMakerInbox. View the changeset: https://github.com/OpenSmalltalk/opensmalltalk-vm/compare/057c59271227...76… View the full build log and details: https://travis-ci.org/OpenSmalltalk/opensmalltalk-vm/builds/436098366?utm_m… -- You can unsubscribe from build emails from the OpenSmalltalk/opensmalltalk-vm repository going to https://travis-ci.org/account/preferences/unsubscribe?repository=8795279&ut…. Or unsubscribe from *all* email updating your settings at https://travis-ci.org/account/preferences/unsubscribe?utm_medium=notificati…. Or configure specific recipients for build notifications in your .travis.yml file. See https://docs.travis-ci.com/user/notifications.

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C source license etc.
by Alistair Grant 02 Oct '18

02 Oct '18

Hi Everyone, When adding new C source files to the VM (platform support files for the FileAttributesPlugin in this case), is there a set of standard comments that should be added to the top of the file, e.g. license conditions, etc.? Thanks, Alistair

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Build failed: opensmalltalk-vm 1.0.1402
by AppVeyor 02 Oct '18

02 Oct '18

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[OpenSmalltalk/opensmalltalk-vm] 76759f: Revert the changes to the BitBltPlugin in VMMaker....
by GitHub 02 Oct '18

02 Oct '18

Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 76759fbda48a86563d22d75b3a5aff950e0c378d https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/76759fbda48a86563d… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2018-10-02 (Tue, 02 Oct 2018) Changed paths: M src/plugins/BitBltPlugin/BitBltPlugin.c Log Message: ----------- Revert the changes to the BitBltPlugin in VMMaker.oscog-eem.2445. This is not ready for prime time yet and has moved to the VMMakerInboRevert the changes to the BitBltPlugin in VMMaker.oscog-eem.2445. This is not ready for prime time yet and has moved to the VMMakerInbox. **NOTE:** This service has been marked for deprecation: https://developer.github.com/changes/2018-04-25-github-services-deprecation/ Functionality will be removed from GitHub.com on January 31st, 2019.

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Build failed: opensmalltalk-vm 1.0.1401
by AppVeyor 02 Oct '18

02 Oct '18

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Latest VM "tears" screen
by Alistair Grant 02 Oct '18

02 Oct '18

Hi Everyone, I've just rebuilt my vmmaker squeak image and found that dragging windows around "tears" the windows underneath, as shown in the attached image. Bringing the damaged window to the front causes the contents to be redrawn correctly. I also saw this when building a pharo vm a couple of days ago. It causes tests in PNGReadWriterTest class to fail (#test2BitReversed, #test4BitReversed and #test8BitReversed from memory). I'm guessing the change was made in the last 6 weeks or so. If no one recognises this I'll start looking at it in a few days (I hope). Thanks, Alistair $ sqlinux.201809301616/squeak --version 5.0-201809301616 Sun Sep 30 16:24:40 UTC 2018 gcc 4.8 [Production Spur 64-bit VM] CoInterpreter VMMaker.oscog-eem.2437 uuid: 0e97c106-dd0b-437b-b1aa-e15257288c3f Sep 30 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2432 uuid: 7b14d114-0e04-4e46-b8a7-4b5e6d87f5fe Sep 30 2018 VM: 201809301616 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Sun Sep 30 09:16:55 2018 CommitHash: 057c592 Plugins: 201809301616 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Linux travis-job-0b521285-dae6-496e-a96c-06870f88a3a5 4.4.0-101-generic #124~14.04.1-Ubuntu SMP Fri Nov 10 19:05:36 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux plugin path: sqlinux.201809301616/lib/squeak/5.0-201809301616 [default: /home/alistair/vmmaker/opensmalltalk-vm/image20181001/sqlinux.201809301616/lib/squeak/5.0-201809301616/] OS: Ubuntu 16.04

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VM Maker: VMMaker.oscog-eem.2445.mcz
by commits＠source.squeak.org 02 Oct '18

02 Oct '18

Eliot Miranda uploaded a new version of VMMaker to project VM Maker: http://source.squeak.org/VMMaker/VMMaker.oscog-eem.2445.mcz ==================== Summary ==================== Name: VMMaker.oscog-eem.2445 Author: eem Time: 28 September 2018, 5:34:39.268193 pm UUID: ecf80f10-9e24-4ff5-8a41-d65cb2690c94 Ancestors: VMMaker.oscog-eem.2444 Fix degenerate calculations of preload and skew (i.e. a preload that sets notSkewMask to all ones and skewMask to zero, and there-by fix accessing the word beyond the end of a bitmap. If using external forms such access can crash the VM by trying to access a word that is not in memory (e.g. in an unmapped page). N.B. when preload is true, notSkewMask is all ones and skewMask is zero this extra word is read but discarded. Clean up primitiveCopyBits & primitiveWarpBits to use the more modern (and simpler) methodReturnReceiver style. Recategorise some C library extensions as such. =============== Diff against VMMaker.oscog-eem.2444 =============== Item was changed: ----- Method: BitBltSimulation>>copyLoop (in category 'inner loop') ----- copyLoop | prevWord thisWord skewWord halftoneWord mergeWord hInc y unskew skewMask notSkewMask mergeFnwith destWord | "This version of the inner loop assumes noSource = false." <inline: false> <var: #prevWord type: #'unsigned int'> <var: #thisWord type: #'unsigned int'> <var: #skewWord type: #'unsigned int'> <var: #halftoneWord type: #'unsigned int'> <var: #mergeWord type: #'unsigned int'> <var: #destWord type: #'unsigned int'> <var: #skewMask type: #'unsigned int'> <var: #notSkewMask type: #'unsigned int'> <var: #unskew type: #int> "unskew is a bitShift and MUST remain signed, while skewMask is unsigned." <var: #mergeFnwith declareC: 'unsigned int (*mergeFnwith)(unsigned int, unsigned int)'> mergeFnwith := self cCoerce: (opTable at: combinationRule+1) to: 'unsigned int (*)(unsigned int, unsigned int)'. mergeFnwith. "null ref for compiler" hInc := hDir * 4. "Byte delta" + "degenerate skew fixed in sourceSkewAndPointerInit, eem 9/28/2018" + self assert: (skew > -32 and: [skew < 32]). + skew < 0 + ifTrue: + [unskew := skew + 32. + skewMask := AllOnes << (0 - skew)] - "degenerate skew fixed for Sparc. 10/20/96 ikp" - skew = -32 - ifTrue: [skew := unskew := skewMask := 0] ifFalse: + [skew = 0 - [skew < 0 ifTrue: + [unskew := 0. + skewMask := AllOnes] - [unskew := skew+32. - skewMask := AllOnes << (0-skew)] ifFalse: + [unskew := skew - 32. + skewMask := AllOnes >> skew]]. - [skew = 0 - ifTrue: - [unskew := 0. - skewMask := AllOnes] - ifFalse: - [unskew := skew-32. - skewMask := AllOnes >> skew]]]. notSkewMask := skewMask bitInvert32. noHalftone ifTrue: [halftoneWord := AllOnes. halftoneHeight := 0] ifFalse: [halftoneWord := self halftoneAt: 0]. y := dy. "Here is the vertical loop, in two versions, one for the combinationRule = 3 copy mode, one for the general case." combinationRule = 3 ifTrue: [1 to: bbH do: "here is the vertical loop for combinationRule = 3 copy mode; no need to call merge" [ :i | halftoneHeight > 1 ifTrue: "Otherwise, its always the same" [halftoneWord := self halftoneAt: y. y := y + vDir]. preload ifTrue: "load the 64-bit shifter" [prevWord := self srcLongAt: sourceIndex. self incSrcIndex: hInc] ifFalse: [prevWord := 0]. "Note: the horizontal loop has been expanded into three parts for speed:" "This first section requires masking of the destination store..." destMask := mask1. thisWord := self srcLongAt: sourceIndex. "pick up next word" self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). prevWord := thisWord. destWord := self dstLongAt: destIndex. destWord := (destMask bitAnd: (skewWord bitAnd: halftoneWord)) bitOr: (destWord bitAnd: destMask bitInvert32). self dstLongAt: destIndex put: destWord. self incDestIndex: hInc. "This central horizontal loop requires no store masking" destMask := AllOnes. (skew = 0 and: [halftoneWord = AllOnes]) ifTrue: "Very special inner loop for STORE mode with no skew -- just move words" [hDir = -1 ifTrue: "Woeful patch: revert to older code for hDir = -1" [2 to: nWords-1 do: [ :word | thisWord := self srcLongAt: sourceIndex. self incSrcIndex: hInc. self dstLongAt: destIndex put: thisWord. self incDestIndex: hInc]] ifFalse: [2 to: nWords-1 do: [ :word | "Note loop starts with prevWord loaded (due to preload)" self dstLongAt: destIndex put: prevWord. self incDestIndex: hInc. prevWord := self srcLongAt: sourceIndex. self incSrcIndex: hInc]]] ifFalse: [2 to: nWords-1 do: [ :word | thisWord := self srcLongAt: sourceIndex. self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). prevWord := thisWord. self dstLongAt: destIndex put: (skewWord bitAnd: halftoneWord). self incDestIndex: hInc]]. "This last section, if used, requires masking of the destination store..." nWords > 1 ifTrue: [destMask := mask2. thisWord := self srcLongAt: sourceIndex. "pick up next word" self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). destWord := self dstLongAt: destIndex. destWord := (destMask bitAnd: (skewWord bitAnd: halftoneWord)) bitOr: (destWord bitAnd: destMask bitInvert32). self dstLongAt: destIndex put: destWord. self incDestIndex: hInc]. self incSrcIndex: sourceDelta. self incDestIndex: destDelta]] ifFalse: [1 to: bbH do: "here is the vertical loop for the general case (combinationRule ~= 3)" [ :i | halftoneHeight > 1 ifTrue: "Otherwise, its always the same" [halftoneWord := self halftoneAt: y. y := y + vDir]. preload ifTrue: "load the 64-bit shifter" [prevWord := self srcLongAt: sourceIndex. self incSrcIndex: hInc] ifFalse: [prevWord := 0]. "Note: the horizontal loop has been expanded into three parts for speed:" "This first section requires masking of the destination store..." destMask := mask1. thisWord := self srcLongAt: sourceIndex. "pick up next word" self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). prevWord := thisWord. destWord := self dstLongAt: destIndex. mergeWord := self mergeFn: (skewWord bitAnd: halftoneWord) with: destWord. destWord := (destMask bitAnd: mergeWord) bitOr: (destWord bitAnd: destMask bitInvert32). self dstLongAt: destIndex put: destWord. self incDestIndex: hInc. "This central horizontal loop requires no store masking" destMask := AllOnes. 2 to: nWords-1 do: "Normal inner loop does merge:" [ :word | thisWord := self srcLongAt: sourceIndex. "pick up next word" self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). prevWord := thisWord. mergeWord := self mergeFn: (skewWord bitAnd: halftoneWord) with: (self dstLongAt: destIndex). self dstLongAt: destIndex put: mergeWord. self incDestIndex: hInc]. "This last section, if used, requires masking of the destination store..." nWords > 1 ifTrue: [destMask := mask2. thisWord := self srcLongAt: sourceIndex. "pick up next word" self incSrcIndex: hInc. skewWord := ((prevWord bitAnd: notSkewMask) bitShift: unskew) bitOr: "32-bit rotate" ((thisWord bitAnd: skewMask) bitShift: skew). destWord := self dstLongAt: destIndex. mergeWord := self mergeFn: (skewWord bitAnd: halftoneWord) with: destWord. destWord := (destMask bitAnd: mergeWord) bitOr: (destWord bitAnd: destMask bitInvert32). self dstLongAt: destIndex put: destWord. self incDestIndex: hInc]. self incSrcIndex: sourceDelta. self incDestIndex: destDelta]]! Item was changed: ----- Method: BitBltSimulation>>primitiveCopyBits (in category 'primitives') ----- primitiveCopyBits "Invoke the copyBits primitive. If the destination is the display, then copy it to the screen." | rcvr | <export: true> rcvr := interpreterProxy stackValue: interpreterProxy methodArgumentCount. + (self loadBitBltFrom: rcvr) ifFalse: + [^interpreterProxy primitiveFail]. - (self loadBitBltFrom: rcvr) ifFalse:[^interpreterProxy primitiveFail]. self copyBits. + interpreterProxy failed ifTrue: [^nil]. - interpreterProxy failed ifTrue:[^nil]. self showDisplayBits. + interpreterProxy failed ifTrue: [^nil]. + (combinationRule = 22 or: [combinationRule = 32]) + ifTrue: [interpreterProxy methodReturnInteger: bitCount] + ifFalse: [interpreterProxy methodReturnReceiver]! - interpreterProxy failed ifTrue:[^nil]. - interpreterProxy pop: interpreterProxy methodArgumentCount. - (combinationRule = 22) | (combinationRule = 32) ifTrue:[ - interpreterProxy pop: 1. - ^ interpreterProxy pushInteger: bitCount].! Item was changed: ----- Method: BitBltSimulation>>primitiveWarpBits (in category 'primitives') ----- primitiveWarpBits "Invoke the warpBits primitive. If the destination is the display, then copy it to the screen." | rcvr | <export: true> rcvr := interpreterProxy stackValue: interpreterProxy methodArgumentCount. (self loadWarpBltFrom: rcvr) ifFalse:[^interpreterProxy primitiveFail]. self warpBits. interpreterProxy failed ifTrue:[^nil]. self showDisplayBits. interpreterProxy failed ifTrue:[^nil]. + interpreterProxy methodReturnReceiver! - interpreterProxy pop: interpreterProxy methodArgumentCount.! Item was changed: ----- Method: BitBltSimulation>>sourceSkewAndPointerInit (in category 'setup') ----- sourceSkewAndPointerInit "This is only used when source and dest are same depth, ie, when the barrel-shift copy loop is used." | dWid sxLowBits dxLowBits pixPerM1 | <inline: true> pixPerM1 := destPPW - 1. "A mask, assuming power of two" sxLowBits := sx bitAnd: pixPerM1. dxLowBits := dx bitAnd: pixPerM1. "check if need to preload buffer (i.e., two words of source needed for first word of destination)" hDir > 0 ifTrue: ["n Bits stored in 1st word of dest" dWid := bbW min: destPPW - dxLowBits. preload := (sxLowBits + dWid) > pixPerM1] ifFalse: [dWid := bbW min: dxLowBits + 1. preload := (sxLowBits - dWid + 1) < 0]. "calculate right-shift skew from source to dest" + skew := (sourceMSB + ifTrue: [sxLowBits - dxLowBits] + ifFalse: [dxLowBits - sxLowBits]) * destDepth. " -32..32 " - sourceMSB - ifTrue:[skew := (sxLowBits - dxLowBits) * destDepth] - ifFalse:[skew := (dxLowBits - sxLowBits) * destDepth]. " -32..32 " preload ifTrue: + [skew ~= 0 ifTrue: + [skew := skew < 0 ifTrue: [skew + 32] ifFalse: [skew - 32]]. + skew = 0 ifTrue: + [preload := false]]. - [skew < 0 - ifTrue: [skew := skew+32] - ifFalse: [skew := skew-32]]. "Calc byte addr and delta from longWord info" + sourceIndex := sourceBits + (sy * sourcePitch) + ((sx // (32 // sourceDepth)) * 4). - sourceIndex := sourceBits + (sy * sourcePitch) + ((sx // (32//sourceDepth)) *4). "calculate increments from end of 1 line to start of next" sourceDelta := (sourcePitch * vDir) - (4 * (nWords * hDir)). preload ifTrue: ["Compensate for extra source word fetched" + sourceDelta := sourceDelta - (4*hDir)]! - sourceDelta := sourceDelta - (4*hDir)].! Item was changed: + ----- Method: VMClass>>asString: (in category 'C library extensions') ----- - ----- Method: VMClass>>asString: (in category 'C library simulation') ----- asString: aStringOrStringIndex "aStringOrStringIndex is either a string or an address in the heap. Create a String of the requested length form the bytes in the heap starting at stringIndex." <doNotGenerate> | sz | aStringOrStringIndex isString ifTrue: [^aStringOrStringIndex]. sz := self strlen: aStringOrStringIndex. ^self strncpy: (ByteString new: sz) _: aStringOrStringIndex _: sz! Item was changed: + ----- Method: VMClass>>asString:size: (in category 'C library extensions') ----- - ----- Method: VMClass>>asString:size: (in category 'C library simulation') ----- asString: stringIndex size: stringSize "stringIndex is an address in the heap. Create a String of the requested length form the bytes in the heap starting at stringIndex." <doNotGenerate> ^self strncpy: (ByteString new: stringSize) _: stringIndex _: stringSize!

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Re: [Vm-dev] Latest VM "tears" screen
by Max Leske 01 Oct '18

01 Oct '18

Hi Alistair, > > Hi Everyone, > > I've just rebuilt my vmmaker squeak image and found that dragging > windows around "tears" the windows underneath, as shown in the > attached image. Bringing the damaged window to the front causes the > contents to be redrawn correctly. > > I also saw this when building a pharo vm a couple of days ago. It > causes tests in PNGReadWriterTest class to fail (#test2BitReversed, > #test4BitReversed and #test8BitReversed from memory). > > I'm guessing the change was made in the last 6 weeks or so. > > If no one recognises this I'll start looking at it in a few days (I > hope). I'v seen this today on macOS 10.14 (Mojave). I didn't think anything of it because since Mojave I can't run any of my old VM's properly due to a problem that looks very similar but doesn't go away unless I resize the image window, which I obviously can't do after every click. Also, the tearing effect in the old VM's is much worse. I'm pretty sure the two issues aren't directly related but I thought I'd put it out there, just in case. Max > > Thanks, > Alistair > > > $ sqlinux.201809301616/squeak --version > 5.0-201809301616 Sun Sep 30 16:24:40 UTC 2018 gcc 4.8 [Production > Spur 64-bit VM] > CoInterpreter VMMaker.oscog-eem.2437 uuid: > 0e97c106-dd0b-437b-b1aa-e15257288c3f Sep 30 2018 > StackToRegisterMappingCogit VMMaker.oscog-eem.2432 uuid: > 7b14d114-0e04-4e46-b8a7-4b5e6d87f5fe Sep 30 2018 > VM: 201809301616 https://github.com/OpenSmalltalk/opensmalltalk-vm.git > Date: Sun Sep 30 09:16:55 2018 CommitHash: 057c592 > Plugins: 201809301616 > https://github.com/OpenSmalltalk/opensmalltalk-vm.git > Linux travis-job-0b521285-dae6-496e-a96c-06870f88a3a5 > 4.4.0-101-generic #124~14.04.1-Ubuntu SMP Fri Nov 10 19:05:36 UTC 2017 > x86_64 x86_64 x86_64 GNU/Linux > plugin path: sqlinux.201809301616/lib/squeak/5.0-201809301616 > [default: > /home/alistair/vmmaker/opensmalltalk-vm/image20181001/sqlinux.201809301616/lib/squeak/5.0-201809301616/] > > OS: Ubuntu 16.04

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Vm-dev October 2018