[Bug 2065280] [NEW] libsnappy-dev: Ambiguity in Compress method signatures causes FTBFS in ceph

[James Page]

Public bug reported:

Imported from Debian bug http://bugs.debian.org/1070785:

Package: libsnappy-dev
Version: 1.2.0-2
Severity: important
Tags: ftbfs
X-Debbugs-Cc: james.page at ubuntu.com

Dear Maintainer,

The patch added to restore older API signatures to resolve Bug 1070217
creates ambiguity in the method signatures resulting in FTBFS in at
least the ceph package:

In file included from /<<PKGBUILDDIR>>/src/compressor/snappy/CompressionPluginSnappy.h:20,
                 from /<<PKGBUILDDIR>>/src/compressor/snappy/CompressionPluginSnappy.cc:20:
/<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h: In member function ‘virtual int SnappyCompressor::compress(const ceph::bufferlist&, ceph::bufferlist&, std::optional<int>&)’:
/<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h:68:21: error: call of overloaded ‘Compress(BufferlistSource*, snappy::UncheckedByteArraySink*)’ is ambiguous
   68 |     snappy::Compress(&source, &sink);
      |     ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
In file included from /<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h:18:
/usr/include/snappy.h:81:10: note: candidate: ‘size_t snappy::Compress(Source*, Sink*)’
   81 |   size_t Compress(Source* reader, Sink* writer);
      |          ^~~~~~~~
/usr/include/snappy.h:82:10: note: candidate: ‘size_t snappy::Compress(Source*, Sink*, CompressionOptions)’
   82 |   size_t Compress(Source* reader, Sink* writer,
      |          ^~~~~~~~
make[3]: *** [src/compressor/snappy/CMakeFiles/ceph_snappy.dir/build.make:79: src/compressor/snappy/CMakeFiles/ceph_snappy.dir/CompressionPluginSnappy.cc.o] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:7668: src/compressor/snappy/CMakeFiles/ceph_snappy.dir/all] Error 2

The compression options parameter which was added for >= 1.2 of snappy
provides a default, so the added method with no options creates this
ambiguity.

Thanks!

-- System Information:
Debian Release: trixie/sid
  APT prefers oracular
  APT policy: (500, 'oracular')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.8.0-31-generic (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libsnappy-dev depends on:
ii  libsnappy1v5  1.2.0-2

libsnappy-dev recommends no packages.

libsnappy-dev suggests no packages.

-- no debconf information

** Affects: snappy (Ubuntu)
     Importance: High
         Status: Triaged

** Affects: snappy (Debian)
     Importance: Undecided
         Status: New

** Bug watch added: Debian Bug tracker #1070785
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1070785

** Changed in: snappy (Debian)
 Remote watch: None => Debian Bug tracker #1070785

** Changed in: snappy (Ubuntu)
       Status: New => Triaged

** Changed in: snappy (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/2065280

Title:
  libsnappy-dev: Ambiguity in Compress method signatures causes FTBFS in
  ceph

Status in snappy package in Ubuntu:
  Triaged
Status in snappy package in Debian:
  New

Bug description:
  Imported from Debian bug http://bugs.debian.org/1070785:

  Package: libsnappy-dev
  Version: 1.2.0-2
  Severity: important
  Tags: ftbfs
  X-Debbugs-Cc: james.page at ubuntu.com

  Dear Maintainer,

  The patch added to restore older API signatures to resolve Bug 1070217
  creates ambiguity in the method signatures resulting in FTBFS in at
  least the ceph package:

  In file included from /<<PKGBUILDDIR>>/src/compressor/snappy/CompressionPluginSnappy.h:20,
                   from /<<PKGBUILDDIR>>/src/compressor/snappy/CompressionPluginSnappy.cc:20:
  /<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h: In member function ‘virtual int SnappyCompressor::compress(const ceph::bufferlist&, ceph::bufferlist&, std::optional<int>&)’:
  /<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h:68:21: error: call of overloaded ‘Compress(BufferlistSource*, snappy::UncheckedByteArraySink*)’ is ambiguous
     68 |     snappy::Compress(&source, &sink);
        |     ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
  In file included from /<<PKGBUILDDIR>>/src/compressor/snappy/SnappyCompressor.h:18:
  /usr/include/snappy.h:81:10: note: candidate: ‘size_t snappy::Compress(Source*, Sink*)’
     81 |   size_t Compress(Source* reader, Sink* writer);
        |          ^~~~~~~~
  /usr/include/snappy.h:82:10: note: candidate: ‘size_t snappy::Compress(Source*, Sink*, CompressionOptions)’
     82 |   size_t Compress(Source* reader, Sink* writer,
        |          ^~~~~~~~
  make[3]: *** [src/compressor/snappy/CMakeFiles/ceph_snappy.dir/build.make:79: src/compressor/snappy/CMakeFiles/ceph_snappy.dir/CompressionPluginSnappy.cc.o] Error 1
  make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
  make[2]: *** [CMakeFiles/Makefile2:7668: src/compressor/snappy/CMakeFiles/ceph_snappy.dir/all] Error 2

  The compression options parameter which was added for >= 1.2 of snappy
  provides a default, so the added method with no options creates this
  ambiguity.

  Thanks!

  -- System Information:
  Debian Release: trixie/sid
    APT prefers oracular
    APT policy: (500, 'oracular')
  Architecture: amd64 (x86_64)
  Foreign Architectures: i386

  Kernel: Linux 6.8.0-31-generic (SMP w/16 CPU threads; PREEMPT)
  Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
  Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
  Shell: /bin/sh linked to /usr/bin/dash
  Init: systemd (via /run/systemd/system)
  LSM: AppArmor: enabled

  Versions of packages libsnappy-dev depends on:
  ii  libsnappy1v5  1.2.0-2

  libsnappy-dev recommends no packages.

  libsnappy-dev suggests no packages.

  -- no debconf information

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