Kotlin/JS Invalid property id when adding cursor pointer style to span - kotlin-js

Question

Here is the code:
h.span {
css {
cursor = Cursor.pointer
}
+"∄"
...
}
When compiled, it produces the following error:
> Task :browser:processDceKotlinJs FAILED
error: at /.../build/js/packages/kjs-browser/kotlin/kjs-browser.js (1193, 185): invalid property id
Examining the location of the error, we see it's at the $receiver_0.cursor line, below, and it indicates the entry default (at position 185):
function RecordList$lambda$lambda$lambda$lambda$lambda$lambda$lambda(closure$id, closure$updateList) {
return function ($receiver) {
var $receiver_0 = {};
$receiver_0.cursor = (/*union*/{alias: 'alias', allScroll: 'all-scroll', cell: 'cell', colResize: 'col-resize', contextMenu: 'context-menu', copy: 'copy', crosshair: 'crosshair', default: 'default', eResize: 'e-resize', ewResize: 'ew-resize', grab: 'grab', grabbing: 'grabbing', help: 'help', move: 'move', nResize: 'n-resize', neResize: 'ne-resize', neswResize: 'nesw-resize', noDrop: 'no-drop', notAllowed: 'not-allowed', nsResize: 'ns-resize', nwResize: 'nw-resize', nwseResize: 'nwse-resize', pointer: 'pointer', progress: 'progress', rowResize: 'row-resize', sResize: 's-resize', seResize: 'se-resize', swResize: 'sw-resize', text: 'text', verticalText: 'vertical-text', wResize: 'w-resize', wait: 'wait', zoomIn: 'zoom-in', zoomOut: 'zoom-out'}/*union*/).pointer;
$receiver.className = css($receiver_0);
$receiver.unaryPlus_pdl1vz$('\u2204');
$receiver.onClick = preventDefault(RecordList$lambda$lambda$lambda$lambda$lambda$lambda$lambda$lambda(closure$id, closure$updateList));
return Unit;
};
}
By removing the css block that sets the pointer style, the error disappears.
As an interesting side note, the code runs just fine in development mode (browserDevelopmentRun).