Unity8 build causes internal compiler error on armhf

[Michał Sawicz]

I've encountered this first today, thought this was a problem with some of my MPs, but have reduced them to no-op and the unity8 trunk does not build on armhf in the PPAs:

In file included from /build/buildd/unity8-8.02+15.04.20150203.7/tests/mocks/Unity/fake_scopes.cpp:21:0:
/build/buildd/unity8-8.02+15.04.20150203.7/tests/mocks/Unity/fake_scopesoverview.h: At global scope:
/build/buildd/unity8-8.02+15.04.20150203.7/tests/mocks/Unity/fake_scopesoverview.h:27:7: internal compiler error: in symtab_remove_unreachable_nodes, at ipa.c:547
 class ScopesOverview : public Scope
       ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.

https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/landing-021/+sourcepub/4753156/+listing-archive-extra

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: gcc-4.9 4.9.2-10ubuntu3
ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4
Uname: Linux 3.18.0-12-generic x86_64
ApportVersion: 2.15.1-0ubuntu4
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Feb 3 17:59:59 2015
SourcePackage: gcc-4.9
SystemImageInfo:
 current build number: 0
 device name:
 channel: daily
 last update: Unknown
UpgradeStatus: No upgrade log present (probably fresh install)

[Matthias Klose (doko)]

a preprocessed source would help

[Colin Watson (cjwatson)]

(vivid-armhf)cjwatson@shedir:~/unity8-8.02+15.04.20150123.3/obj-arm-linux-gnueabihf/tests/mocks/Unity$ /usr/bin/arm-linux-gnueabihf-g++-4.9 -DFakeUnityQml_EXPORTS -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_NO_DEBUG -DQT_NO_KEYWORDS -DQT_QML_LIB -DQT_QUICK_LIB -DQT_STRICT_ITERATORS -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fvisibility=hidden -std=c++11 -fno-permissive -pedantic -Wall -Wextra -fPIC -I/home/cjwatson/unity8-8.02+15.04.20150123.3/include -I/home/cjwatson/unity8-8.02+15.04.20150123.3/obj-arm-linux-gnueabihf/include -I/home/cjwatson/unity8-8.02+15.04.20150123.3/obj-arm-linux-gnueabihf/tests/mocks/Unity -isystem /usr/include/arm-linux-gnueabihf/qt5 -isystem /usr/include/arm-linux-gnueabihf/qt5/QtCore -isystem /usr/lib/arm-linux-gnueabihf/qt5/mkspecs/linux-g++ -isystem /usr/include/arm-linux-gnueabihf/qt5/QtQuick -isystem /usr/include/arm-linux-gnueabihf/qt5/QtQml -I/usr/include/arm-linux-gnueabihf/qt5/QtNetwork -isystem /usr/include/arm-linux-gnueabihf/qt5/QtGui -I/usr/include/glib-2.0 -I/usr/lib/arm-linux-gnueabihf/glib-2.0/include -o CMakeFiles/FakeUnityQml.dir/fake_scopes.cpp.o -c /home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopes.cpp -save-temps
/home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopes.cpp: In member function 'virtual void Scopes::setFavorite(const QString&, bool)':
/home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopes.cpp:183:21: warning: unused variable 'scope' [-Wunused-variable]
         for (Scope *scope : m_scopes) {
                     ^
In file included from /home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopes.cpp:21:0:
/home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopesoverview.h: At global scope:
/home/cjwatson/unity8-8.02+15.04.20150123.3/tests/mocks/Unity/fake_scopesoverview.h:27:7: internal compiler error: in symtab_remove_unreachable_nodes, at ipa.c:547
 class ScopesOverview : public Scope
       ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccXrHoJO.out file, please attach this to your bugreport.

[Colin Watson (cjwatson)]

(vivid-armhf)cjwatson@shedir:~/unity8-8.02+15.04.20150123.3/obj-arm-linux-gnueabihf/tests/mocks/Unity$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.9/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.9.2-10ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror --enable-multilib --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 4.9.2 (Ubuntu/Linaro 4.9.2-10ubuntu3)

[Steve Langasek (vorlon)]

Matthias mentions that a possible workaround for this issue would be to build just the failing source file with -O1. Michał, does that help unblock you on this issue?

[Michał Sawicz (saviq)]

Yes, for reference:

# Workaround for gcc failure LP: #1417664
set_source_files_properties(fake_scopes.cpp PROPERTIES COMPILE_FLAGS -O1)

[kevin gunn (kgunn72)]

lowering priority since we have a workaround

[Doko-v (doko-v)]

Created attachment 34668
test case

$ arm-linux-gnueabihf-gcc -c -g -O2 -std=c++11 -Wno-attributes -Wno-non-template-friend test.ii
test.ii:66:53: internal compiler error: in symtab_remove_unreachable_nodes, at ipa.c:547
 H<J *> Scopes::favScopes() const { return m_scopes; }
                                                     ^
Please submit a full bug report,
with preprocessed source if appropriate.

configured with --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb

not seen on the trunk, introduced by backporting the fix for PR63970. Reverting this backport lets the test case build.

[Doko-v (doko-v)]

couldn't find any approval email on gcc-patches for the backport. Was this supposed to go to the gcc-4.9 google branch?

[Doko-v (doko-v)]

Author: doko
Date: Wed Feb 4 23:36:22 2015
New Revision: 220426

URL: https://gcc.gnu.org/viewcvs?rev=220426&root=gcc&view=rev
Log:
2015-02-04 Matthias Klose <email address hidden>

        PR target/64938
        Backport from mainline
        2015-01-15 Jan Hubicka <email address hidden>

        PR ipa/64068
        PR ipa/64559
        * ipa.c (symbol_table::remove_unreachable_nodes):
        Do not put abstract origins into boundary.

2015-02-04 Matthias Klose <email address hidden>

        Backport from mainline
        2015-01-15 Martin Liska <email address hidden>

        * g++.dg/ipa/pr64068.C: New test.
        * gcc.dg/ipa/PR64559.c: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/ipa/pr64068.C
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/ipa/PR64559.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/ipa.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog

[Wmi (wmi)]

Author: wmi
Date: Thu Feb 5 00:27:54 2015
New Revision: 220431

URL: https://gcc.gnu.org/viewcvs?rev=220431&root=gcc&view=rev
Log:
Backport from gcc-4_9-branch.
2015-02-04 Matthias Klose <email address hidden>

        PR target/64938
        Backport from mainline
        2015-01-15 Jan Hubicka <email address hidden>

        PR ipa/64068
        PR ipa/64559
        * ipa.c (symbol_table::remove_unreachable_nodes):
        Do not put abstract origins into boundary.

Added:
    branches/google/gcc-4_9/gcc/testsuite/g++.dg/ipa/pr64068.C
    branches/google/gcc-4_9/gcc/testsuite/gcc.dg/ipa/PR64559.c
Modified:
    branches/google/gcc-4_9/gcc/ipa.c

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-4.9 - 4.9.2-10ubuntu5

---------------
gcc-4.9 (4.9.2-10ubuntu5) vivid; urgency=medium

  * Update to SVN 20150204 (r220426) from the gcc-4_9-branch.
  * Revert the workaround for PR target/64938, and backport the real fix
    to the 4.9 branch. LP: #1417664.
 -- Matthias Klose <email address hidden> Thu, 05 Feb 2015 00:49:51 +0100

[Pinskia (pinskia)]

Fixed.

[Ctice (ctice)]

Author: ctice
Date: Thu Feb 19 00:43:33 2015
New Revision: 220805

URL: https://gcc.gnu.org/viewcvs?rev=220805&root=gcc&view=rev
Log:
Backport patch from Google 4.9 branch (r220431):

r220431 | wmi | 2015-02-04 16:27:54 -0800 (Wed, 04 Feb 2015) | 12 lines

Backport from gcc-4_9-branch.
2015-02-04 Matthias Klose <email address hidden>

        PR target/64938
        Backport from mainline
        2015-01-15 Jan Hubicka <email address hidden>

        PR ipa/64068
        PR ipa/64559
        * ipa.c (symbol_table::remove_unreachable_nodes):
        Do not put abstract origins into boundary.

Added:
    branches/google/gcc-4_9-mobile/gcc/testsuite/g++.dg/ipa/pr64068.C
    branches/google/gcc-4_9-mobile/gcc/testsuite/gcc.dg/ipa/PR64559.c
Modified:
    branches/google/gcc-4_9-mobile/gcc/ipa.c

[Steve Langasek (vorlon)]

Hello Michał, or anyone else affected,

Accepted gccgo-4.9 into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/gccgo-4.9/4.9.3-0ubuntu4 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!

[Steve Langasek (vorlon)]

This bug was not identified with gccgo, only with g++, which is not applicable to the in-progress gccgo-4.9 SRU.

[Steve Langasek (vorlon)]

The verification of the Stable Release Update for gccgo-4.9 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.