Your message dated Wed, 27 May 2020 19:16:27 +0000 with message-id <[email protected]> and subject line Bug#916837: Removed package(s) from unstable has caused the Debian Bug report #904116, regarding clang-6.0: Memory sanitiser false positives to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 904116: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904116 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: clang-6.0 Version: 1:6.0.1-2 Severity: normal The attached reduced testcase gives a false positive with memory sanitiser: Uninitialized bytes in __interceptor_memcmp at offset 0 inside [0x7ffc2bd76598, 1) ==16008==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x7fe07c37b069 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x120069) #1 0x49a6be in bool std::operator==<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*) /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:6075:20 #2 0x49a612 in bool std::operator!=<char, std::char_traits<char>, std::allocator<char> >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*) /usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/basic_string.h:6113:22 #3 0x49a3f9 in main /home/olly/git/xapian-1.4/xapian-core/tests/memsanfalsepositive.cc:5:41 #4 0x7fe07bee0b16 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x22b16) #5 0x41e349 in _start (/home/olly/git/xapian-1.4/xapian-core/tests/a.out+0x41e349) SUMMARY: MemorySanitizer: use-of-uninitialized-value (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x120069) in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const Exiting I suspect the problem might be that libstdc++ needs to be built with memory sanitiser too - the documentation at https://clang.llvm.org/docs/MemorySanitizer.html#limitations notes: | MemorySanitizer requires that all program code is instrumented. This | also includes any libraries that the program depends on, even libc. | Failing to achieve this may result in false reports. (I get what appears to be the same error if I use clang-7 1:7~svn331965-1 instead, but since that seems to be an SVN snapshot version, I've reported this against the stable release version). Cheers, Olly -- System Information: Debian Release: buster/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.16.0-1-amd64 (SMP w/8 CPU cores) Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8), LANGUAGE=en_NZ:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages clang-6.0 depends on: ii binutils 2.31.1-1 ii libc6 2.27-5 ii libc6-dev 2.27-5 ii libclang-common-6.0-dev 1:6.0.1-2 ii libclang1-6.0 1:6.0.1-2 ii libgcc-7-dev 7.3.0-26 ii libgcc1 1:8.1.0-11 ii libjsoncpp1 1.7.4-3 ii libllvm6.0 1:6.0.1-2 ii libobjc-7-dev 7.3.0-26 ii libstdc++-7-dev 7.3.0-26 ii libstdc++6 8.1.0-11 Versions of packages clang-6.0 recommends: ii libomp-dev 6.0.1-1 ii llvm-6.0-dev 1:6.0.1-2 ii python 2.7.15-3 Versions of packages clang-6.0 suggests: pn clang-6.0-doc <none> pn gnustep <none> pn gnustep-devel <none> -- no debconf information#include <string> inline std::string foo(std::string s) { return s; } int main(int, char**) { return foo("x") != "x"; }
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--- Begin Message ---Version: 1:6.0.1-14.1+rm Dear submitter, as the package llvm-toolchain-6.0 has just been removed from the Debian archive unstable we hereby close the associated bug reports. We are sorry that we couldn't deal with your issue properly. For details on the removal, please see https://bugs.debian.org/916837 The version of this package that was in Debian prior to this removal can still be found using http://snapshot.debian.org/. Please note that the changes have been done on the master archive and will not propagate to any mirrors until the next dinstall run at the earliest. This message was generated automatically; if you believe that there is a problem with it please contact the archive administrators by mailing [email protected]. Debian distribution maintenance software pp. Scott Kitterman (the ftpmaster behind the curtain)
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