On Wed, 07 Dec 2016 14:33:54 -0800, jan-olof.hen...@bredband.net wrote: > # the system, 32 bit Linux vm running under VirtualBox > dogbert@dogbert-VirtualBox ~ $ cat /etc/os-release > NAME="Ubuntu" > VERSION="14.04.3 LTS, Trusty Tahr" > ID=ubuntu > ID_LIKE=debian > PRETTY_NAME="Ubuntu 14.04.3 LTS" > VERSION_ID="14.04" > HOME_URL="http://www.ubuntu.com/"; > SUPPORT_URL="http://help.ubuntu.com/"; > BUG_REPORT_URL=http://bugs.launchpad.net/ubuntu/ > > dogbert@dogbert-VirtualBox ~ $ perl6 -v > This is Rakudo version 2016.11-149-g5bacb0573 built on MoarVM version > 2016.11-36-g2c50886b > implementing Perl 6.c. > > # the problem > # run the following script (tried to golf more), I call it scratch.pl6 > # https://gist.github.com/dogbert17/41042137f44394a0094c1cc1c05055bb > Running the code results in a SEGV > > AlexDaniel did a quick bisect with the bisectbot and uncovered the following > commit as a likely suspect: > https://github.com/rakudo/rakudo/commit/172898eb1ee5ea3e47b29cf12b668be71362 > 146d >
It managed to look like both a GC bug and an inlining bug in MoarVM, but actually ended up being a boring callstack region overflow bug that affected some (and only some) heavily recursive code. It's fixed now, and there's a test to cover it in integration/deep-recursion-initing-native-array.t. /jnthn
