https://issues.dlang.org/show_bug.cgi?id=18984
Issue ID: 18984 Summary: Debugging stack struct's which are returned causes incorrect debuginfo. Product: D Version: D2 Hardware: x86_64 OS: Windows Status: NEW Severity: major Priority: P1 Component: visuald Assignee: nob...@puremagic.com Reporter: turkey...@gmail.com Created attachment 1704 --> https://issues.dlang.org/attachment.cgi?id=1704&action=edit Test case >From the prior conversation: > Debugging issues: > Stack allocated struct won't show values correctly (repro project attached) > Supply metadata0.bin as commandline arg > Place watch at lines 91 and 119, step and watch the values of `Frame f` > and `Packet p` as they are populated with data > Notice that those stack structs do not appear to be changing, and show > rubbish values. You can see the actual value in the hidden return value __HID1/__HID2 (you can see the symbol in the disassembly). dmd seems to ignore RVO when emitting the debug info. --