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13b008b56c
advance() asserts that each byte it steps over is either an ASCII byte
or a UTF-8 sequence leader, never a continuation byte (0x80–0xBF).
consumeName() was calling advance(1) for all non-ASCII bytes
('\x80'...'\xFF'), processing multi-byte sequences one byte at a time.
For a two-byte sequence like é (0xC3 0xA9), the second iteration landed
on the continuation byte 0xA9 and triggered the assertion, crashing the
browser in Debug mode.
Fix: replace advance(1) with consumeChar() for all non-ASCII bytes.
consumeChar() reads the lead byte, derives the sequence length via
utf8ByteSequenceLength, and advances the full code point in one step,
so the position never rests on a continuation byte.
Observed on saintcyrlecole.caliceo.com, whose root element carries an
inline style with custom property names containing French accented
characters (--color-store-bulles-été-fg, etc.). The crash aborted JS
execution before the Angular app could render any dynamic content.