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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r13-7628] libstdc++: Avoid warning in std::format Date: Fri, 28 Jul 2023 17:32:36 +0000 (GMT) [thread overview] Message-ID: <20230728173236.4BCD73853D05@sourceware.org> (raw) https://gcc.gnu.org/g:6302b8b7ed2e1cb67dec5d7d20e34d4c8e35161c commit r13-7628-g6302b8b7ed2e1cb67dec5d7d20e34d4c8e35161c Author: Jonathan Wakely <jwakely@redhat.com> 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) {
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