Fixes another memory leak and improves travis config

[glebm]

1. Fixes another memory leak.
2. Uses the default clang for ASan on Travis (v5.0) and adds an ASAN_OPTIONS work-around for ODR violation red herring caused by https://bugs.llvm.org/show_bug.cgi?id=37545.

This still doesn't completely fix the Travis ASan build but it brings us much closer.

[glebm]

Can't figure out why it's failing the error tests (and can't reproduce locally).

Some memory leaks are reported in plugins. I've sent the following PRs:

mgreter/libsass-glob#1
mgreter/libsass-digest#1
mgreter/libsass-tests#1

For libsass-tests, there is still one ASan error that I haven't figured out.

[glebm]

@mgreter I've fixed all the memory leaks reported in the plugins. Can you please merge the PRs?

[mgreter]

Hi @glebm, will do once I get back home from knee surgery, might take a few more days. Best regards and thanks for your work.

[glebm]

@mgreter Sorry to hear about your surgery. Forget about GitHub and focus on recovering! I hope you get better soon! Thank you for letting us know.

[mgreter]

@glebm Merged all your PRs so you can continue to get ASAN build green :) Thanks for your work and looking forward to confirm it all myself once I'm a bit more mobile again 👍

[xzyfer]

Kicked off a rebuild if master. Looks there are compilation failures in the plugin tests. I'm out at dinner so I can't look into it any further ATM.

https://travis-ci.org/sass/libsass/builds/458739532

[glebm]

Sent mgreter/libsass-tests#2

[glebm]

It is finally green! #2760

[xzyfer]

🎉

…

On Sun., 25 Nov. 2018, 11:51 am Gleb Mazovetskiy ***@***.*** wrote: It is finally green! #2760 <#2760> — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#2753 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAjZWEJl_fHPRrD91DkuNW1UdmKNPlAjks5uyemagaJpZM4YsPwL> .