Catch and properly report compile errors that Less.js's toCSS() can throw
Catch and properly report compile errors that Less.js's toCSS() can throw

BS3 commits: f1102430eca4b498294b457020bedda8a8890d52

2947721120/todc-bootstrap,todc/todc-bootstrap,ztx1491/todc-bootstrap,mozillo/todc-bootstrap,2947721120/googlebt4,todc/todc-bootstrap,todc/todc-bootstrap,up2vs/todc-bootstrap,aaroncnhk/todc-bootstrap