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File pipe IO problematic #3618

Open p6rt opened 9 years ago

p6rt commented 9 years ago

Migrated from rt.perl.org#123484 (status was 'open')

Searchable as RT123484$

p6rt commented 9 years ago

From mickyc@shaw.ca

I have compiled Rakudo Star from the source package and it reports​: This is perl6 version 2014.09 built on MoarVM version 2014.09

The system fifo read crashes with the error included at the bottom. The test was done with two scripts in two separate xterm instances.

Thank you for all of the wonderful work.

Michael Chajkowski

** One shell running this​:

my $pipe = 'test_pipe'.IO; for (1..Inf) -> $iter {   spurt $pipe, sprintf "This is it %00d\n", $iter;   sleep 1; };

** Another shell running this​:

my $pipe = 'test_pipe'.IO;

while 1 {   $pipe.get.say; # $pipe.lines.say;   sleep 1; }

** Using .get

Failed to seek in filehandle​: 29   in method eof at src/gen/m-CORE.setting​:14679   in method get at src/gen/m-CORE.setting​:14687   in block \ at ./test.p6​:11

** Using .lines

Failed to seek in filehandle​: 29   in code at src/gen/m-CORE.setting​:14716   in block at src/gen/m-CORE.setting​:8328   in block at src/gen/m-CORE.setting​:8332   in method reify at src/gen/m-CORE.setting​:8358   in method reify at src/gen/m-CORE.setting​:8021   in method reify at src/gen/m-CORE.setting​:8021   in method reify at src/gen/m-CORE.setting​:8122   in method reify at src/gen/m-CORE.setting​:8021   in method reify at src/gen/m-CORE.setting​:8021   in method gimme at src/gen/m-CORE.setting​:8508   in method eager at src/gen/m-CORE.setting​:8482   in method join at src/gen/m-CORE.setting​:1817   in method gist at src/gen/m-CORE.setting​:8920   in sub say at src/gen/m-CORE.setting​:15179   in method say at src/gen/m-CORE.setting​:1136   in block \ at ./test.p6​:11

p6rt commented 9 years ago

From @raydiak

http://irclog.perlgeek.de/perl6/2014-12-23#i_9846422

my $pipe = 'testpipe'.IO;

say $pipe.slurp; # always returns an empty string

my $handle = $pipe.open; # blocks until there is something to read...note 'read' is not called yet

say $handle.read(1); # read works say $handle.getc(); # getc seems to work say $handle.getc(1); # "Too many positionals passed"...this one is just a design vs implementation discrepancy?

say $handle.get; # "Failed to seek in filehandle​: 29" say $handle.lines; # "Failed to seek in filehandle​: 29" say $handle.eof; # "Failed to seek in filehandle​: 29"

This is perl6 version 2014.12-9-gfb9127c built on MoarVM version 2014.12 Linux 3.16.0-28-generic #​38-Ubuntu SMP Sat Dec 13 16​:13​:28 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

p6rt commented 9 years ago

The RT System itself - Status changed from 'new' to 'open'