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carbon-lang/toolchain/lex
Richard SmithandJon Ross-Perkins e68e54dae4 Issue a diagnostic if we try to parse a source file that is too large. (#4429)
Previously in an optimized build we'd produce bogus tokens, such as
tokens with incorrect IdentifierIds, and in a debug build we would try
to CHECK-fail -- but actually wouldn't, because we're incorrectly
checking for `2 << bits` instead of `1 << bits`. I hit this while I was
trying to do some profiling and was seeing some very strange
diagnostics.

The diagnostic is pointed at the first token that is beyond the limit to
help people determine where to split their files.

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Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
2024-10-22 23:21:35 +00:00
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2024-10-17 18:47:29 +00:00
2023-09-01 02:39:04 +00:00