Make the lexer UTF-8 RFC 3629 correct re: prefix octets #6088
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RFC 2279 states that, in UTF-8: "The octet values FE and FF never appear." RFC 3629 states that, in UTF-8: "The octet values C0, C1, F5 to FF never appear." Generalize the check to advance past invalid starting bytes for a UTF-8 sequence to fix a crash in the lexer.
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@swift-ci Please smoke test and merge |
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RFC 2279 states that, in UTF-8:
"The octet values FE and FF never appear."
RFC 3629 states that, in UTF-8:
"The octet values C0, C1, F5 to FF never appear."
Generalize the check to advance past invalid starting bytes for
a UTF-8 sequence to fix a crash in the lever.
rdar://problem/28822218