Re: writeln() assertion failed in hybrid x64

[hane via Digitalmars-d-learn]

On Thursday, 4 September 2014 at 15:10:22 UTC, Jorge A. S. wrote:
I'm having an error related to yours: when I call writeln 
function in a closed stdout I will get a segfault message. 
Example:

import std.stdio;

void main() {
  stdout.close();
  write("hello\n");
}

The code above will crash with segfault buf the following code 
will raise an exception instead:

import std.stdio;

void main() {
  stdout.close();
  stdout.write("hello\n");
}

In one of the specializations of the write function in the 
std.stdio (the call site that you showed in your post) no check 
for closed stdout (when stdout._p is null) is done. I can't say 
if this is a bug in the write function or the desired behaviour 
(I'm a novice here).


With DMD of git master, the latter code seems to raise Exception 
(stdio.d(2247): Enforcement failed) instead of segfault.