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C++ PATCH for c++/83947, ICE with auto deduction

From: Jason Merrill <jason at redhat dot com>
To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Tue, 23 Jan 2018 16:18:17 -0500
Subject: C++ PATCH for c++/83947, ICE with auto deduction
Authentication-results: sourceware.org; auth=none

In this testcase, we were deducing a type for g from the function f
which has not yet been deduced itself.  Fixed by recognizing the case
of an undeduced initializer.

The change to undeduced_auto_decl is necessary because auto parameters
are a different story; they act more like normal template parameters.

Tested x86_64-pc-linux-gnu, applying to trunk.

Attachment: 83947.diff
Description: Text document

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