gccgo crash on powerpc

[Robie Basak]

I see panics of the form below in https://launchpad.net/~snappy-dev/+archive/ubuntu/image/+build/7403985 and https://launchpad.net/ubuntu/+source/docker.io/1.6.0+dfsg1-1ubuntu1/+build/7397683 causing FTBFS for snappy and docker.io on powerpc. As these have separate Go codebases I assume this is a compiler bug?

   dh_auto_build -a -O--buildsystem=golang -O--fail-missing
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x3]

goroutine 16 [running]:
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:131
runtime_throw
 ../../../src/libgo/runtime/panic.c:193
sig_panic_leadin
 ../../../src/libgo/runtime/go-signal.c:247
sig_panic_info_handler
 ../../../src/libgo/runtime/go-signal.c:281

 :0
__go_go
 ../../../src/libgo/runtime/proc.c:2328
runtime_main
 ../../../src/libgo/runtime/proc.c:598

goroutine 0 [idle]:
panic during panic

goroutine 0 [idle]:
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:131
runtime_startpanic
 ../../../src/libgo/runtime/panic.c:100
runtime_throw
 ../../../src/libgo/runtime/panic.c:191
runtime_gogo
 ../../../src/libgo/runtime/proc.c:251
runtime_tracebackothers
 ../../../src/libgo/runtime/proc.c:767
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:139
runtime_throw
 ../../../src/libgo/runtime/panic.c:193
sig_panic_leadin
 ../../../src/libgo/runtime/go-signal.c:247
sig_panic_info_handler
 ../../../src/libgo/runtime/go-signal.c:281

 :0
__go_go
 ../../../src/libgo/runtime/proc.c:2328
runtime_main
 ../../../src/libgo/runtime/proc.c:598
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x3]

goroutine 16 [running]:
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:131
runtime_throw
 ../../../src/libgo/runtime/panic.c:193
sig_panic_leadin
 ../../../src/libgo/runtime/go-signal.c:247
sig_panic_info_handler
 ../../../src/libgo/runtime/go-signal.c:281

 :0
__go_go
 ../../../src/libgo/runtime/proc.c:2328
runtime_main
 ../../../src/libgo/runtime/proc.c:598

goroutine 0 [idle]:
panic during panic

goroutine 0 [idle]:
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:131
runtime_startpanic
 ../../../src/libgo/runtime/panic.c:100
runtime_throw
 ../../../src/libgo/runtime/panic.c:191
runtime_gogo
 ../../../src/libgo/runtime/proc.c:251
runtime_tracebackothers
 ../../../src/libgo/runtime/proc.c:767
runtime_dopanic
 ../../../src/libgo/runtime/panic.c:139
runtime_throw
 ../../../src/libgo/runtime/panic.c:193
sig_panic_leadin
 ../../../src/libgo/runtime/go-signal.c:247
sig_panic_info_handler
 ../../../src/libgo/runtime/go-signal.c:281

 :0
__go_go
 ../../../src/libgo/runtime/proc.c:2328
runtime_main
 ../../../src/libgo/runtime/proc.c:598
dh_auto_build: go install -v returned exit code 2

[Launchpad Janitor (janitor)]

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

[Adam Conrad (adconrad)]

This is not docker-specific. It happens for nuntium as well (see the duped bug). This is definitely a regression from gccgo-5 in vivid.

[Matthias Klose (doko)]

seen already when calling go version

[Robie Basak (racb)]

This also failed for go-md2man: https://launchpadlibrarian.net/207705117/buildlog_ubuntu-wily-powerpc.go-md2man_1.0.2-1ubuntu1_BUILDING.txt.gz

[Launchpad Janitor (janitor)]

This bug was fixed in the package gcc-5 - 5.1.1-9ubuntu2

---------------
gcc-5 (5.1.1-9ubuntu2) wily; urgency=medium

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

gcc-5 (5.1.1-9) unstable; urgency=medium

  * Update to SVN 20150602 (r224029, 5.1.1) from the gcc-5-branch.
  * Remove byte-compiled libstdc++ pretty printer files on upgrade.
    Closes: #785939.
  * Fix dangling libgccjit.so symlink.
  * Fix base dependency for rtlibs stage builds.
  * Fix build failure of the hppa64 cross compiler, introduced by the
    gnat cross patches. Closes: #786692.
  * Update README.source (Michael Vogt).
  * libgo: syscall.Sendfile(): Apply proposed patch for PR go/66378.
    (Michael Vogt). LP: #1460530.
  * Set CC and CXX matching the same GCC version for the stage1 build.
  * Work around PR go/66368, build libgo with -fno-stack-protector.
    LP: #1454183.

 -- Matthias Klose <email address hidden> Wed, 03 Jun 2015 01:02:23 +0200