[Issue 17797] [REG 2.073.2] double print to stdout when reading stdin in another thread

Oct 03, 2017

Walter Bright

Oct 03, 2017

ag0aep6g@gmail.com

Oct 09, 2017

Martin Nowak

Oct 10, 2017

Rainer Schuetze

https://issues.dlang.org/show_bug.cgi?id=17797 Walter Bright <bugzilla@digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bugzilla@digitalmars.com Component|dmd |phobos Hardware|x86 |All --- Comment #1 from Walter Bright <bugzilla@digitalmars.com> --- It happens on Win32 as well, which uses the DMC runtime library, not Microsoft's. So it is not specific to the Microsoft runtime library. I suspect it is a Phobos problem, not a compiler issue, and changed the category accordingly. --

https://issues.dlang.org/show_bug.cgi?id=17797 ag0aep6g@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ag0aep6g@gmail.com --- Comment #2 from ag0aep6g@gmail.com --- (In reply to Walter Bright from comment #1) > It happens on Win32 as well, which uses the DMC runtime library, not Microsoft's. So it is not specific to the Microsoft runtime library. It *only* happens with the DMC runtime. People are running 64-bit Windows, but they're not using 64-bit dmd. I just tested in a virtual machine with -m32mscoff and didn't see duplicated lines. --

October 09, 2017

[Issue 17797] [REG 2.073.2] double print to stdout when reading stdin in another thread

Posted by Martin Nowak

Permalink

Martin Nowak

Permalink

https://issues.dlang.org/show_bug.cgi?id=17797

Martin Nowak <code@dawg.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |code@dawg.eu
           Hardware|All                         |x86

--- Comment #3 from Martin Nowak <code@dawg.eu> ---
cat > bug.d << CODE
import std.stdio, core.thread;

void main()
{
    auto thread = new Thread(&func).start;
    writeln("Output");
    writeln("Output2");
    writeln("Output3");
    thread.join();
}

void func()
{
    foreach (line; stdin.byLineCopy)
    {
    }
}
CODE
dmd -run bug.d
----
Slightly nicer version that terminates on EOF (Ctrl+D), works as expected on
linux.

Sure about 2.073.2? The only interesting change in

https://github.com/dlang/dmd/compare/v2.073.1...v2.073.2 https://github.com/dlang/druntime/compare/v2.073.1...v2.073.2 https://github.com/dlang/phobos/compare/v2.073.1...v2.073.2

is https://github.com/dlang/dmd/pull/6582.

--

https://issues.dlang.org/show_bug.cgi?id=17797 Rainer Schuetze <r.sagitario@gmx.de> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |r.sagitario@gmx.de --- Comment #4 from Rainer Schuetze <r.sagitario@gmx.de> --- I could verify it happens with 2.073.2, but not 2.073.1. This is caused by an updated snn.lib. Might be introduced by the fix for issue 13727. --

Forums