91 Rodeo Total Brake failure

Recently had the front left brake line rust out & fail on this 91 Rodeo. Nothing happened & not a real big deal to replace. BUT, when this line
failed there were NO brakes at all, just the parking brake & thank goodness it's a stick shift -driving in a very mountainous region of British Columbia. So my question is this: Isn't there supposed to be some fail-safe braking even when a line fails. That is if a front line goes aren't the backs still supposed to work? What else is could be wrong? Thanks, BCin BC
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.