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64b775419d
Invalid UTF-8 was being best-effort consumed, which given the right sequence of brokenness, could end up with diagnostic locations referring to bytes beyond the end of a line. Improve the UTF-8 decoding so that it can detect when multi-byte codepoints are missing the high-bit being set. Actually detect this in a lexer, and parser and produce errors. Bug: tint:1437 Bug: chromium:1305648 Change-Id: I459f0df840b4ce8c4f5f82363f93602bf8326984 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/83540 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>