TC39 General on 2025-05-04

15:37	<Jack Works>	Is this correct? For RegExp: `/[\p{Hex}]/u`: https://tc39.es/ecma262/#sec-compiletocharset For production `UnicodePropertyValueExpression :: LoneUnicodePropertyNameOrValue`, `s` is `Hex`, in step 2 it calls `UnicodeMatchPropertyValue(General_Category, s)` `UnicodeMatchPropertyValue` (https://tc39.es/ecma262/#sec-runtime-semantics-unicodematchpropertyvalue-p-v) 2. Assert: `v` (in this case, `Hex`) is a property value or property value alias for the Unicode property `p` (in this case, General_Category) listed in PropertyValueAliases.txt. https://unicode.org/Public/UCD/latest/ucd/PropertyValueAliases.txt And in https://unicode.org/Public/UCD/latest/ucd/PropertyValueAliases.txt , there is no entry starts with `gc ; Hex` so this assert should fail. Did I miss something? Thanks!
16:06	<bakkot>	yeah that looks like a bug
16:06	<bakkot>	you should open an issue and cc `@mathiasbynens`
16:28	<Jack Works>	https://github.com/tc39/ecma262/issues/3586
16:59	<jmdyck>	Doesn't that fail the early error?
17:00	<jmdyck>	(The one that says it's a Syntax Error if that Assert would fail.)
17:01	<jmdyck>	Or am I missing the crux of the example?
17:04	<bakkot>	`/[\p{Hex}]/u` is intended to be legal, I am pretty sure
17:04	<bakkot>	certainly it is treated as such in actual implementations
17:06	<jmdyck>	oh, actually, that early error rule passes, because "Hex" appears in Table 70.
17:45	<Richard Gibson>	PR to fix: https://github.com/tc39/ecma262/pull/3587