On Sunday, 6 January 2013 at 23:16:13 UTC, Phil Lavoie wrote:
since moving the constructor away seems to work correctly
(-version=Working).
Mmmm... But no construction happens, empty parameters equals
default .init. Perhaps it's a bug related to confusing
lvalue/rvalue and it's trying to access a temporary variable
outside it's scope (so it has garbage data); but even with
garbage data...
@property bool empty() {
writeln("Empty!");
_current = glGetError();
return ( _current == GL_NO_ERROR );
}
@property GLenum front() {
writeln("Front!");
return _current;
}
void popFront() { writeln("PopFront!"); }
}
If it dies before printing 'Empty!' or 'Front!' then it could be
a temporary reference variable bug (I really doubt ctor, although
a garbage pointer would cause the problem too).
If it dies instead at glGetError it likely is a hidden global
variable is getting messed up/not initialized (though seems
unlikely).
Decompile the assembly code around the foreach loop and the
working version, that will give us a definitive explanation of
what's really going on.
Mmmm I wonder... __traits(compiles) allowed me to see a hidden
added 'void* this;' pointer in a union; Perhaps...
else {
//Crashes in non defined version.
assert(__traits(compiles, {
foreach( GLenum err; GLErrors() ) {
const int a;
a++; // breaking on purpose, may show full unrolling
// of compiler re-written code
writeln( glError( err ) );
}
}));
}
