[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Launchpad Bug Tracker]

This bug was fixed in the package libc++ - 3.7.0-1ubuntu0.1

---
libc++ (3.7.0-1ubuntu0.1) xenial; urgency=medium

  * Fix error int the string header in c++11 mode (LP: #1610168).

 -- Sergey Vidyuk   Sat, 24 Jun 2017 18:09:34
+0700

** Changed in: libc++ (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Mathew Hodson]

** Tags removed: verification-needed verification-needed-xenial
** Tags added: verification-done-xenial

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Giuseppe D'Angelo]

Seems to be working just fine here, thank you very much!

Verification steps:

1. Get a C++11 source file that #includes :

#include 

int main() {
std::string s{"foobar"};
}

2. compile it with clang++ -stdlib=libc++ -std=c++11

3. if it compiles (which now it does) the bug is fixed.

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Brian Murray]

Hello Giuseppe, or anyone else affected,

Accepted libc++ into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/libc++/3.7.0-1ubuntu0.1 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 on 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-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. 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: libc++ (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-xenial

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[LocutusOfBorg]

** Changed in: libc++ (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: libc++ (Ubuntu)
   Status: Confirmed => Fix Released

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  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Mathew Hodson]

** Changed in: libc++ (Ubuntu Xenial)
   Importance: Undecided => High

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  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Brian Murray]

** Also affects: libc++ (Ubuntu Xenial)
   Importance: Undecided
   Status: New

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Bug Watch Updater]

** Changed in: libc++ (Debian)
   Status: Unknown => Fix Released

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  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Mathew Hodson]

** Bug watch added: Debian Bug tracker #808086
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808086

** Also affects: libc++ (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808086
   Importance: Unknown
   Status: Unknown

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Simon Quigley]

Sponsored to Xenial.

Thank you for your contribution to Ubuntu! It's really appreciated. :)

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[LocutusOfBorg]

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

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Giuseppe D'Angelo]

Added the SRU info, added ~ubuntu-bug-control.

** Description changed:

  This is mirroring Debian bug #808086 https://bugs.debian.org/cgi-
  bin/bugreport.cgi?bug=808086
  
  Compiling any source file that includes  with clang 3.8 and
  -std=c++11 -stdlib=libc++ results in a compile error.
  
  While this is a minor bug in Debian (as it doesn't ship 3.8 yet), xenial
  does, and that's a major problem as it makes libc++ useless.
  
- 
  clang: warning: argument unused during compilation: '-stdlib=libc++'
  In file included from test.cpp:1:
  In file included from /usr/include/c++/v1/iostream:38:
  In file included from /usr/include/c++/v1/ios:216:
  In file included from /usr/include/c++/v1/__locale:15:
  /usr/include/c++/v1/string:1938:44: error: 'basic_string<_CharT, _Traits, 
_Allocator>' is missing exception specification 
'noexcept(is_nothrow_copy_constructible::value)'
  basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& 
__a)
-^
+    ^
  /usr/include/c++/v1/string:1326:76: note: previous declaration is here
- __attribute__ ((__visibility__("hidden"), __always_inline__)) explicit 
basic_string(const allocator_type& __a)
-^
+ __attribute__ ((__visibility__("hidden"), __always_inline__)) explicit 
basic_string(const allocator_type& __a)
+    ^
  1 error generated.
+ 
+ --
+ 
+ Update (30 Aug 2017): as per
+ https://wiki.ubuntu.com/StableReleaseUpdates :
+ 
+ [Impact]
+ 
+ This bug makes it impossible to compile any C++11 source file that
+ includes  with clang 3.8 using libc++. Any non-trivial C++11
+ codebase is affected, making the whole libc++ package useless.
+ 
+ [Test Case]
+ 
+ See above. Create a C++ file that simply contains #include  and
+ compile it with clang++ -std=c++11 -stdlib=libc++ file.cpp.
+ 
+ [Regression Potential]
+ 
+ The current  header simply does not work with clang-3.8 under
+ any condition, so there is no regression potential.
+ 
+ The regression potential for GCC is also extremely limited: no package
+ whatsoever uses GCC in combination with libc++, and the fact that GCC
+ 5.4 -- currently in Xenial -- does not detect the error that Clang
+ detects is just showing that GCC is bugged in this regard.
+ 
+ [Other Info]
+ 
+ The patch/workaround fixes the problem. See also the discussion at the
+ linked Debian bug report as well as https://stackoverflow.com/q/37096062

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Giuseppe D'Angelo]

Could also someone set the severity to High? As per:

"Renders essential features or functionality of the application or
dependencies broken or ineffective "

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Giuseppe D'Angelo]

Hello,

Xenial is still affected by this AFAICS. And yes, I'd like it to be
fixed there.

17.04/17.10 shouldn't be affected, as they're using libc++ 3.9.1 which
has fixed the corresponding bug in Debian. (No idea about ~ubuntu-
sponsors, to be honest...).

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Simon Quigley]

Hello!

Could you please indicate which releases are still affected by this?
Also, if you would like to get this in Xenial, which is a stable
release, please follow the SRU policy:
https://wiki.ubuntu.com/StableReleaseUpdates

For now, I'm unsubscribing ~ubuntu-sponsors because it's not clear what
there is to sponsor. Please feel free to resubscribe ~ubuntu-sponsors
once things are clarified.

Thanks!

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Ubuntu Foundations Team Bug Bot]

The attachment "proposed patch to the deb package in xenial" seems to be
a debdiff.  The ubuntu-sponsors team has been subscribed to the bug
report so that they can review and hopefully sponsor the debdiff.  If
the attachment isn't a patch, please remove the "patch" flag from the
attachment, remove the "patch" tag, and if you are member of the
~ubuntu-sponsors, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issue please contact him.]

** Tags added: patch

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[VestniK]

I've added patch to solve this issue to the list of debian/patches
rebuild the package and checked that this issue is fixed. Debdiff file
is attached.

** Attachment added: "proposed patch to the deb package in xenial"
   
https://bugs.launchpad.net/ubuntu/+source/libc++/+bug/1610168/+attachment/4902706/+files/libcxx-debdiff

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Tony Lewis]

This problem's still active in 16.10 (Yakkety).

Discussion of this issue on Stack Overflow:

http://stackoverflow.com/q/37096062

One commenter ("peppe") argues this bug is worse on Ubuntu than on
Debian because the broken version only ships as experimental in Debian.


Workaround:

http://stackoverflow.com/a/38385967

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Title:
  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
  exception specification

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[Bug 1610168] Re: error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: libc++ (Ubuntu)
   Status: New => Confirmed

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  error: 'basic_string<_CharT, _Traits, _Allocator>' is missing
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