macOS Mojave segmentation faults and malloc errors

[schultz-is]

I've been seeing a couple intermittent errors when using lastpass-cli on macOS Mojave.

One issue is a segfault:

% lpass show -c --password <ACCOUNT>
zsh: segmentation fault  lpass show -c --password <ACCOUNT>

The other appears to be a malloc issue:

% lpass show -c --password <ACCOUNT>
lpass(27361,0x11655b5c0) malloc: *** error for object 0xec83485354415541: pointer being freed was not allocated
lpass(27361,0x11655b5c0) malloc: *** set a breakpoint in malloc_error_break to debug
zsh: abort      lpass show -c --password <ACCOUNT>

This seems to occur both with the prepackaged Homebrew binary and with a locally compiled binary. Happy to provide more context or dig in further if needed.

[cmcfadden]

More discussion in #427

[schultz-is]

Whoops. Good catch. Not sure how I missed that in search. Going to close this one in favor of that one.