base-bs3\bootstrap\less\glyphicons.less

@font-face {
font-family: 'Glyphicons Halflings';
src: url('@{icon-font-path}@{icon-font-name}.eot');
src: url('@{icon-font-path}@{icon-font-name}.eot?#iefix') format('embedded-opentype'),
url('@{icon-font-path}@{icon-font-name}.woff2') format('woff2'),
url('@{icon-font-path}@{icon-font-name}.woff') format('woff'),
url('@{icon-font-path}@{icon-font-name}.ttf') format('truetype'),
url('@{icon-font-path}@{icon-font-name}.svg#@{icon-font-svg-id}') format('svg');
}

includes woff2 URL and source but base-bs3\bootstrap\fonts\glyphicons-halflings-regular.woff2 is missing