Ubuntu
gcc-5 package

__FUNCTION__ causes g++ internal compiler error in constexpr functions

Bug #1593608 reported by cub
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gcc-5 (Ubuntu)
Fix Released
Undecided
Unassigned
Xenial
Fix Released
Undecided
Unassigned

Bug Description

// bug.cpp
// g++ -std=c++14 bug.cpp -DCAUSE_GCC_INTERNAL_COMPILER_ERROR
inline constexpr bool bug() noexcept {
#ifdef CAUSE_GCC_INTERNAL_COMPILER_ERROR
  auto tmp = __FUNCTION__; // same for __PRETTY_FUNCTION__
#else
  auto tmp = "bug";
#endif
  return true;
}
static_assert(bug(), "g++ 5.3.1 bug");
int main(int, const char *[]) { return 0; }

$ g++ -std=c++14 bug.cpp

$ g++ -std=c++14 bug.cpp -DCAUSE_GCC_INTERNAL_COMPILER_ERROR
bug.cpp:11:18: in constexpr expansion of ‘bug()’
bug.cpp:11:38: internal compiler error: Segmentation fault
 static_assert(bug(), "g++ 5.3.1 bug");
                                      ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.

$ gcc --version
gcc (Ubuntu 5.3.1-14ubuntu2.1) 5.3.1 20160413
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS"

Revision history for this message
Matthias Klose (doko) wrote :

fixed in yakkety and in ppa:ubuntu-toolchain-r/ppa (which is supposed to go to xenial-updates)

Changed in gcc-5 (Ubuntu):
status: New → In Progress
Matthias Klose (doko)
Changed in gcc-5 (Ubuntu):
status: In Progress → Fix Released
Revision history for this message
Martin Pitt (pitti) wrote : Please test proposed package

Hello Curtis, or anyone else affected,

Accepted gcc-5 into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/gcc-5/5.4.0-6ubuntu1~16.04 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in gcc-5 (Ubuntu Xenial):
status: New → Fix Committed
tags: added: verification-needed
Revision history for this message
Matthias Klose (doko) wrote :

works with the version in xenial-proposed

tags: added: verification-done
removed: verification-needed
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (8.1 KiB)

This bug was fixed in the package gcc-5 - 5.4.0-6ubuntu1~16.04.1

---------------
gcc-5 (5.4.0-6ubuntu1~16.04.1) xenial-proposed; urgency=medium

  * SRU: LP: #1586673. Backport GCC 5.4 to 16.04 LTS.
  * Revert a libstdc++ header reorg done after the 5.3.0 release.
  * Add AArch64 Vulcan cpu support, backport from trunk. LP: #1594452.
  * Revert a libstdc++ header reorg done after the 5.3.0 release (only for
    OS releases including a GCC 5 at release time).
  * Fixes C++ ICE. LP: #1593608.

gcc-5 (5.4.0-6ubuntu1) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.4.0-6) unstable; urgency=medium

  * Fix gdc cross build.
  * Disable the AArch64 Vulcan cpu support for FSF builds, needs a proper
    back port.

gcc-5 (5.4.0-5ubuntu1) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.4.0-5) unstable; urgency=medium

  [ Matthias Klose ]
  * Add AArch64 Vulcan cpu support, backport from trunk. LP: #1594452.
  * Revert a libstdc++ header reorg done after the 5.3.0 release (only for
    OS releases including a GCC 5 at release time).
  * Enforce build using binutils 2.26.1 for unstable/development series.
  * Mark cross compilers as M-A: foreign. Addresses: #827136.
  * Remove the MIPS r6 support again, dak doesn't like unknown architectures.

  [ Aurelien Jarno ]
  * Drop support for loongson 2f (YunQiang Su). Closes: #827554.
  * Apply proposed patch from Matthew Fortune to fix libjava on mips64el.

gcc-5 (5.4.0-4ubuntu1) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.4.0-4) unstable; urgency=medium

  * gdc: Fix linking the runtime library. Closes: #826645.
  * gdc: Fix updates from 5.3.x. Closes: #826583.
  * Update the Linaro support to the 5-2016.06 snapshot.
  * Add MIPS r6 support and bump mipsn32(el) ISA to r2 (YunQiang Su).
    Closes: #824986.
  * Avoid storing -fdebug-prefix-map in DW_AT_producer (for better
    reproducibility). Taken from the trunk (Daniel Kahn Gillmor).
    Closes: #819176.

gcc-5 (5.4.0-3ubuntu1) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.4.0-3) unstable; urgency=medium

  * Update Ada patch for KFreeBSD (Steven Chamberlain). Closes: #826332.

gcc-5 (5.4.0-2) unstable; urgency=medium

  * Fix gdc packaging for architectures without libphobos support.

gcc-5 (5.4.0-1) unstable; urgency=medium

  * GCC 5.4.0 release.
    - Fix PR target/68696 (AArch64), PR fortran/70350.
  * Update embedded timestamp setting patch, backported from the trunk.
  * Update the Linaro support to the 5-2016.05 snapshot.
  * Update gdc to the gcc-5 branch 20160603.

gcc-5 (5.3.1-21ubuntu11) yakkety; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.

gcc-5 (5.3.1-21) unstable; urgency=medium

  * GCC 5.4.0 release candidate 1.
  * Update to SVN 20160528 (r236840, 5.3.1) from the gcc-5-branch.
    - Fix PR libstdc++/69703, PR libstdc++/71038, PR libstdc++/71036,
      PR libstdc++/71037, PR libstdc++/71005, PR libstdc++/71004,
      PR libstdc++/70...

Read more...

Changed in gcc-5 (Ubuntu Xenial):
status: Fix Committed → Fix Released
Revision history for this message
Martin Pitt (pitti) wrote : Update Released

The verification of the Stable Release Update for gcc-5 has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

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