1175753 - hyphen should be tokenized as a delim if followed by an invalid escape

Status: NEW

(Core :: CSS Parsing and Computation, defect)

Description

[Cameron McCormack (:heycam)]

Attachment: test

From bug 1175192 comment 4:
> The three character sequence "-\\\n" should tokenize as '-' delim,
> '\\' delim (and an error), "\n" white space.  But I think we currently
> tokenize it as '-' ident, '\\' delim, "\n" white space.
> 
> AFAICT the only place where a '\\' delim will not cause a parse error is in
> the value of a custom property.  Because of the rules about inserting /**/
> between certain adjacent tokens when expanding out var() functions, whether
> the '-' (incorrectly) becomes an ident or (correctly) becomes a delim can
> determine whether that /**/ is generated.
> 
> The attachment illustrates.  I think the spec should require the computed
> value of --b to be serialized as "1-\\\nx", whereas we currently serialize
> it as "1/**/-\\\nx".