digitalmars.D.learn - Behaves different on my osx and linux machines
- =?UTF-8?Q?Christian_K=C3=B6stlin?= (56/56) Dec 21 2023 I have this somehow reduced program that behaves differently on osx and
- Kagamin (22/22) Dec 22 2023 Add more debugging?
- Christian =?UTF-8?B?S8O2c3RsaW4=?= (26/48) Dec 22 2023 Thanks for the suggestion. But it still behaves the same:
- Kagamin (24/24) Dec 27 2023 Maybe write and read lock each other, try to use puts:
- Kagamin (1/1) Dec 27 2023 Maybe you're not supposed to print text while reading?
- Christian =?UTF-8?B?S8O2c3RsaW4=?= (6/7) Dec 27 2023 In parallel I have contacted schveiguy on discord and he found
- Steven Schveighoffer (7/12) Dec 27 2023 Finally had some spare time, and created the issue:
I have this somehow reduced program that behaves differently on osx and
linux.
```d
void stdioMain()
{
import std.stdio : readln, writeln;
import std.concurrency : spawnLinked, receive, receiveTimeout,
LinkTerminated;
import std.variant : Variant;
import std.string : strip;
import std.process : execute;
import core.time : dur;
auto input = spawnLinked(() {
string getInput() {
writeln("Please enter something:");
return readln().strip();
}
string line = getInput();
while (line != "quit")
{
writeln("You entered ", line);
line = getInput();
}
});
bool done = false;
while (!done) {
auto result = ["echo", "Hello World"].execute;
if (result.status != 0)
{
throw new Exception("echo failed");
}
writeln(result.output);
receiveTimeout(dur!"msecs"(-1),
(LinkTerminated t) {
writeln("Done");
done = true;
},
);
}
writeln("ByeBye");
}
void main(string[] args)
{
stdioMain();
}
`
It should just read from stdin in one separate thread and on the main
thread it just executes one `echo` after the other (and tries to find
out, if the other thread finished).
In linux this behaves as expected, meaning it prints a lot of hello worlds.
In osx on the other hand it prints 'please enter something', waits for
my input, prints it, and outputs one hello world.
What did I do wrong?
Kind regards,
Christian
p.s.: i am using ldc-1.35.0 osx version is 13.6.
Dec 21 2023
Add more debugging?
```
bool done = false;
while (!done) {
writeln(1);
auto result = ["echo", "Hello World"].execute;
if (result.status != 0)
{
writeln(2);
throw new Exception("echo failed");
}
writeln(result.output);
receiveTimeout(dur!"msecs"(-1),
(LinkTerminated t) {
writeln("Done");
done = true;
},
);
writeln(3);
}
writeln("ByeBye");
```
Dec 22 2023
On Friday, 22 December 2023 at 15:02:42 UTC, Kagamin wrote:
Add more debugging?
```
bool done = false;
while (!done) {
writeln(1);
auto result = ["echo", "Hello World"].execute;
if (result.status != 0)
{
writeln(2);
throw new Exception("echo failed");
}
writeln(result.output);
receiveTimeout(dur!"msecs"(-1),
(LinkTerminated t) {
writeln("Done");
done = true;
},
);
writeln(3);
}
writeln("ByeBye");
```
Thanks for the suggestion. But it still behaves the same:
Output:
```
Running vibe-io
1
Please enter something:
asdf
You entered asdf
Please enter something:
Hello World
3
1
asdf
You entered asdf
Please enter something:
Hello World
3
1
qwer
You entered qwer
Please enter something:
Hello World
3
1
```
Dec 22 2023
Kagamin <spam here.lot>
Maybe write and read lock each other, try to use puts:
```
bool done = false;
while (!done) {
puts("1");
auto result = ["echo", "Hello World"].execute;
if (result.status != 0)
{
writeln(2);
throw new Exception("echo failed");
}
puts("2");
writeln(result.output);
puts("3");
receiveTimeout(dur!"msecs"(-1),
(LinkTerminated t) {
writeln("Done");
done = true;
},
);
writeln(4);
}
writeln("ByeBye");
```
Dec 27 2023
On Wednesday, 27 December 2023 at 14:03:06 UTC, Kagamin wrote:Maybe you're not supposed to print text while reading?In parallel I have contacted schveiguy on discord and he found the culprid. But we do not have a solution yet. It probably will result in a bugreport at https://issues.dlang.org/. Kind regards, Christian
Dec 27 2023
On Wednesday, 27 December 2023 at 14:38:38 UTC, Christian Köstlin wrote:On Wednesday, 27 December 2023 at 14:03:06 UTC, Kagamin wrote:Finally had some spare time, and created the issue: https://issues.dlang.org/show_bug.cgi?id=24305 Might I say, this is a symptom of depending on C for buffered i/o, and I wish we didn't. -SteveMaybe you're not supposed to print text while reading?In parallel I have contacted schveiguy on discord and he found the culprid. But we do not have a solution yet. It probably will result in a bugreport at https://issues.dlang.org/.
Dec 27 2023