0.6.2 crash in abysal dungeon

[superbob9001]

While entering the abysal dungeon I crossed the west bridge and used a crystal nade against the defenses. I then got a typeError crash

TypeError: Cannot read property 'hasPerk' of null at st (file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/826.a4bb9dd6350781509418.js:1:3672355) at Function.value (file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/826.a4bb9dd6350781509418.js:1:3673036) at file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/Content_Dungeons.2b0f2bf37872292c2fee.js:1:3064834 at Array.forEach () at window.AbyssalDepthsBarricadeDoCombat (file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/Content_Dungeons.2b0f2bf37872292c2fee.js:1:3064792) at Object.func (file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/Content_Dungeons.2b0f2bf37872292c2fee.js:1:3064171) at doClick (file:///C:/Users//Documents/Games/CoC%20II-0.6.2-win/resources/app/256.14af222395261528c56b.js:1:38245) at l (file:///C:/Users/***/Documents/Games/CoC%20II-0.6.2-win/resources/app/826.a4bb9dd6350781509418.js:1:3553611)

I'm a level 7 thief with Cait, Azyrran, and Gweyr in the party

 

[superbob9001]

Confirmed the crash is repeatable with the crystal nade. Using naptha the crash does not occur and I proceed into the fight.

 

[superbob9001]

I updated to 0.6.7 and the crash does not occur anymore