Bug 17173 – Incorrect return value for function accepting and returning cdouble

This code behaves correctly when compiling with DMD v2.072.0 on Win7. It behaves incorrectly with the same DMD version on OSX. import std.stdio; auto fn(in cdouble value){ writeln(value.re + 0i); // Prints 64+0i return value.re + 0i; } unittest{ writeln(fn(64 + 0i)); // Prints 64+64i, should print 64+0i } It behaves correctly if: If writeln is removed from fn (In the case where I encountered this bug, there was other essential code but no writeln, I don't think this is related to writeln specifically) If an empty out contract is added to fn

I cannot reproduce this. Firstly, cdouble is deprecated so std.complex.Complex should be used instead. Secondly, both using cdouble and Complex the result is 64+0i in both prints. Closing as WORKSFORME.