[Bug 1454183] Re: gccgo crash on powerpc

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** Branch linked: lp:debian/gcc-5

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https://bugs.launchpad.net/bugs/1454183

Title:
  gccgo crash on powerpc

Status in The GNU Compiler Collection:
  Unknown
Status in docker.io package in Ubuntu:
  Invalid
Status in gcc-5 package in Ubuntu:
  Fix Released

Bug description:
  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

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