sq_newslot(-3) expects a [table, key, value] three-level stack; the code
pushed only the value, so the slot write silently targeted the native
frame's mode argument (a string, not a table) and was skipped. Handles
therefore had methods but empty _path/_data, making read()/getSize()
throw 'file not readable' on every platform where the stack layout
did not accidentally alias the table.
Fix cardgame's ui.sameLine() calls to pass an id (the binding requires
one), and make the example smoke failure output print non-frame-error
lines so future CI failures carry the real root cause instead of being
buried under per-frame error spam.
西风逍遥游
27e08963e2