From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id 4BCD73853D05; Fri, 28 Jul 2023 17:32:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4BCD73853D05 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1690565556; bh=aDG6D0CDnbhyKeL4UtwedvUIMMRh1Nbeh2pRA5LUG0k=; h=From:To:Subject:Date:From; b=F7JJyycw7CQ7hcgBjUEEFpvnM90GMEwOmVcJs8vyIxGiffDsrCyqdgJSr/LGcnIza o4niR0ZWo2iVywWRcysPWKChyvIGsJ6sdQqXy1q4yQHBGenQ38oGz2As0wblGo/act ZooArlaCabVPfrWq+lATpdHfUMP5yacEEtUKx3qE= MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r13-7628] libstdc++: Avoid warning in std::format X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/releases/gcc-13 X-Git-Oldrev: 13dd1501a1adc5d76c13ae36368bff3c3b64da37 X-Git-Newrev: 6302b8b7ed2e1cb67dec5d7d20e34d4c8e35161c Message-Id: <20230728173236.4BCD73853D05@sourceware.org> Date: Fri, 28 Jul 2023 17:32:36 +0000 (GMT) List-Id: https://gcc.gnu.org/g:6302b8b7ed2e1cb67dec5d7d20e34d4c8e35161c commit r13-7628-g6302b8b7ed2e1cb67dec5d7d20e34d4c8e35161c Author: Jonathan Wakely Date: Tue Jul 18 22:14:32 2023 +0100 libstdc++: Avoid warning in std::format With -Wmaybe-uninitialized -Wsystem-headers there's a warning about creating a string_view from an uninitalized array. Initializing the first element of the array avoids the warning. libstdc++-v3/ChangeLog: * include/std/format (__write_padded): Initialize first element of array to avoid a -Wmaybe-uninitialized warning. (cherry picked from commit 2af0f4c34667efe9924fa4e3aa7b9a87617e5ccd) Diff: --- libstdc++-v3/include/std/format | 1 + 1 file changed, 1 insertion(+) diff --git a/libstdc++-v3/include/std/format b/libstdc++-v3/include/std/format index 9a3896b8339..0c6069b2681 100644 --- a/libstdc++-v3/include/std/format +++ b/libstdc++-v3/include/std/format @@ -610,6 +610,7 @@ namespace __format { const size_t __buflen = 0x20; _CharT __padding_chars[__buflen]; + __padding_chars[0] = _CharT(); basic_string_view<_CharT> __padding{__padding_chars, __buflen}; auto __pad = [&__padding] (size_t __n, _Out& __o) {