#crystal-lang on 2016-09-22 — irc logs at freenode.irclog.whitequark.org

2016-09-16 23:05 RX14 changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.19.2 | Fund Crystals development: http://is.gd/X7PRtI | Paste > 3 lines of text to https://gist.github.com | GH: https://github.com/crystal-lang/crystal | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/ | Logs: http://irclog.whitequark.org/crystal-lang

00:01 <FromGitter> <bcardiff> @piedoom it's because initially the website was hosted in github pages and it doesn't allow plugins like jekyll-haml. And we prefer to write haml than html. It could change now for sure, and remove the build rake tasks

00:54 <travis-ci> crystal-lang/crystal#d657b9a (master - Fixed #3332: incorrect cast placement of `to_u32`): The build is still failing. https://travis-ci.org/crystal-lang/crystal/builds/161757499

00:54 <DeBot> https://github.com/crystal-lang/crystal/issues/3332 (GC_generic_malloc_many sigfault)

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11:32 <crystal-gh> [crystal] asterite pushed 1 new commit to master: https://git.io/vi5Om

11:32 <crystal-gh> crystal/master 1fff36d O_o: fix base64 decode bug (#3337)

11:32 <crystal-gh> [crystal] asterite pushed 2 new commits to master: https://git.io/vi5Os

11:32 <crystal-gh> crystal/master 26abbe9 Ary Borenszweig: Fixed #3339: incorrect type for unpacked block argument after block

11:32 <crystal-gh> crystal/master 85f99ae Ary Borenszweig: Missing function LibGC.size

11:37 <travis-ci> crystal-lang/crystal#1fff36d (master - fix base64 decode bug (#3337)): The build is still failing. https://travis-ci.org/crystal-lang/crystal/builds/161886135

11:37 <DeBot> https://github.com/crystal-lang/crystal/pull/3337 (fix base64 decode bug)

11:52 <travis-ci> crystal-lang/crystal#26abbe9 (master - Fixed #3339: incorrect type for unpacked block argument after block): The build is still failing. https://travis-ci.org/crystal-lang/crystal/builds/161886238

11:52 <DeBot> https://github.com/crystal-lang/crystal/issues/3339 (variables of the same name used inside a block and outside a block causing a compiler error)

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12:26 <FromGitter> <Val> Does *Crystal* handle virtual filesystems unlike others ? ⏎ ⏎ ```File.read("/proc/cpuinfo") # => ""``` [https://gitter.im/crystal-lang/crystal?at=57e3cde3aabc89857fc32b93]

12:26 <BlaXpirit> hm that's an interesting find

12:28 <BlaXpirit> >> File.open("/proc/cpuinfo").gets_to_end

12:28 <DeBot> BlaXpirit: # => "processor\t: 0\nvendor_id\t: GenuineIntel\ncpu family\t: 15\nmodel\t\t: 6\nmodel name\t: Common 32-bit KVM processor\nstepping\t: 1\nmicrocode\t: 0x1\ncpu MHz\t\t: 3411.482\ncache size\t: 4096 KB\nphysical id\t: 0\nsiblings\t: 1\ncore id\t\t: 0\ncpu cores\t: 1\napicid\t\t: 0\ninitial apicid\t: 0\nfdiv_bug\t: no\nf00f_bug\t: no\ncoma_bug\t: no ... - https://carc.in/#/r/1aiz

12:28 <FromGitter> <Val> I just wanted to get cores count to manage parallelism...

12:28 <BlaXpirit> use this as a workaround and feel free to investigate why these behave differently and maybe raise an issue

12:29 <FromGitter> <Val> BlaXpirit: Ok, thx

12:29 <FromGitter> <Val> I'll take a look

12:30 <BlaXpirit> Val, um probably don't use this actual code. the file needs to be closed, or better use the block version of File.open

12:30 <FromGitter> <Val> Ok

12:48 <FromGitter> <Val> @BlaXpirit : it comes from https://github.com/Val/crystal/blob/master/src/file.cr#L385 because the size of the file is `0`: ⏎ ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=57e3d31adf21a757301adf77]

12:48 <BlaXpirit> yeah makes sense

12:49 <BlaXpirit> who knows, arguably maybe this is even the correct behavior

12:49 <BlaXpirit> in that case it needs a remark in the docs

12:49 <BlaXpirit> nah this can't be right

12:50 <FromGitter> <Val> ```ruby -e "puts File.read('/proc/cpuinfo').size" ⏎ 8176``` [https://gitter.im/crystal-lang/crystal?at=57e3d377c8af41d45f38c6b2]

12:50 <BlaXpirit> first of all it could be a race condition

12:50 <BlaXpirit> reading the size, later reading the file

12:50 <BlaXpirit> the file may even have been truncated by that time

12:55 <FromGitter> <Val> Why a file couldn't be read 'till the end if encoding is not available ?

12:56 <FromGitter> <Val> It's the purpose of `File.read` method ?

12:56 <FromGitter> <Val> hum... in case of a binary file it may help

12:57 <FromGitter> <Val> forget it

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15:43 <FromGitter> <raydf> RX14, Is there a shard for this PR? https://github.com/crystal-lang/crystal/pull/3243?. I need an uploading behaviour in a webapp :).

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16:27 <RX14> @raydf, no

16:27 <RX14> but there should be

16:27 <FromGitter> <raydf> ok, thanks

16:31 <RX14> @raydf, i'll make one tonight

16:31 <FromGitter> <raydf> Thanks RX14, that would help me a lot :).

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17:20 <travis-ci> crystal-lang/crystal#4fad8f4 (test/fix-travis - Use latest Docker image in Travis build): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/161964721

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18:48 <crystal-gh> [crystal] waj pushed 1 new commit to master: https://git.io/vidWm

18:48 <crystal-gh> crystal/master 50cee13 Juan Wajnerman: Use latest Docker image in Travis build

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19:55 <travis-ci> crystal-lang/crystal#50cee13 (master - Use latest Docker image in Travis build): The build was fixed. https://travis-ci.org/crystal-lang/crystal/builds/161996604

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20:20 <sp4rrow> what does weakref do in crystal lang?

20:21 <BlaXpirit> sp4rrow, keeps a reference to the object without keeping it from being collected by GC

20:24 <BlaXpirit> i can't even make an example for it

20:24 <BlaXpirit> wtf https://carc.in/#/r/1ak9

20:28 <sp4rrow> thanks I will have to check it out

20:29 <sp4rrow> is this to keep things out of global namespaces or something ?

20:29 <sp4rrow> also would this put objects in being of danger of never being garbage collected?

20:32 <BlaXpirit> sp4rrow, i think you missed the point

20:33 <RX14> BlaXpirit, i think weak refs are only collected when there's a big allocation

20:33 <RX14> i.e. it needs the memory

20:34 <RX14> if weakr efs were collected just for being there they would be quite pointless

20:34 <BlaXpirit> ...

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20:40 <BlaXpirit> can we just get a reference counting GC please... this one is so terrible and unpredictable

20:41 <Papierkorb> They would not be "pointless" in that case. Far from it.

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20:41 <Papierkorb> E.g., a library which uses weak refs to be 'notified' when an external object is no longer referenced anywhere else and thus cleans up other data structures

20:42 <Papierkorb> BlaXpirit: Would be great, much easier to port too :D

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20:44 <sp4rrow> interesting

20:44 <sp4rrow> thanks

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21:18 <RX14> BlaXpirit, why should a GC be predictable?

21:19 <RX14> they exist to trade off accuracy with memory usage

21:19 <RX14> and speed

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