For what it is worth it, I can't reproduce this in Debian Stretch, neither with espeak, nor with espeak-ng.
paul@testavoira ~ $ /usr/bin/espeak -v mb-us3 "Hello world" paul@testavoira ~ $ /usr/bin/espeak-ng -v mb-us3 "Hello world" paul@testavoira ~ $ Note, espeak-ng doesn't actually speak the words, I'll file a bug about that. And shouldn't this bug be assigned to mbrola? The error is: *** Error in `mbrola': free(): invalid pointer: 0x09472da0 *** Paul -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1684280 Title: Running espeak with mbrola voices results in error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/espeak/+bug/1684280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs