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That's correct. I was using the 7.0.0 release. Good to know it's fixed in 8.0. Thanks for investigating!</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Eric Fiselier <eric@efcs.ca><br>
<b>Sent:</b> Thursday, April 25, 2019 3:22 AM<br>
<b>To:</b> Marshall Clow<br>
<b>Cc:</b> Wesley Yue; libcxx-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [libcxx-dev] Potential bug in use of auto in comparator lambda for std::upper_bound when debug build is enabled</font>
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<div dir="ltr">The code referenced in the diagnostics appears in 7.0 but not 8.0.
<div>At some point the debug implementation was removed from upper and lower bound,</div>
<div>but I can't find the exact commit that removed it.</div>
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<div>Either way this should be fixed now.</div>
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<div>/Eric</div>
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<div dir="ltr" class="x_gmail_attr">On Wed, Apr 24, 2019 at 8:41 AM Marshall Clow via libcxx-dev <<a href="mailto:libcxx-dev@lists.llvm.org">libcxx-dev@lists.llvm.org</a>> wrote:<br>
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<div dir="ltr">On Wed, Apr 24, 2019 at 9:15 AM Wesley Yue via libcxx-dev <<a href="mailto:libcxx-dev@lists.llvm.org" target="_blank">libcxx-dev@lists.llvm.org</a>> wrote:<br>
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I'm working on some code that compares two different types with std::upper_bound and does so with a custom lambda, which takes both parameters as type "auto". When building normally, this compiles fine. When building with -D_LIBCPP_DEBUG=1, this fails and somewhere
in the template magic, libc++ seems to confuse the two types and pass them into the lambda backwards.</div>
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Here is some minimal code to reproduce, and the corresponding compilation error:</div>
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<div>I just tried this with libc++ trunk, and didn't get a compile error.</div>
<div>(I got a link error, but that's because I wasn't linking against a debug dylib)</div>
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<div>What version of libc++ are you using?</div>
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<div>-- Marshall</div>
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