https://issues.dlang.org/show_bug.cgi?id=9740
Simen Kjaeraas <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |[email protected] Resolution|--- |INVALID --- Comment #3 from Simen Kjaeraas <[email protected]> --- The map function changes the contents of the array, and unsurprisingly, that changes what the filter filters. This is not a bug in filter and map, but in your code. Reduced example: auto arr = [[false]]; writeln(arr.filter!(a => a[0]).map!(a => a[0] = true)); // [] writeln(arr.filter!(a => !a[0]).map!(a => a[0] = true)); // [true] writeln(arr.filter!(a => a[0]).map!(a => a[0] = true)); // [false] This is possibly caused by a misguided idea that the array is a value type. --
