java: wrap decoder IllegalStateException as IOException in BrotliInputStream.read #1414
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Problem: Decode.decompress(state) may throw IllegalStateException via Utils.makeError (e.g. "Brotli error code: -22").
BrotliInputStream.read(...) currently wraps only BrotliRuntimeException, so this decoder failure escapes as an
unchecked exception.
Fix: Wrap IllegalStateException from the decoder as IOException, consistent with existing handling of BrotliRuntimeException.
Impact: Only affects invalid/corrupted streams (error path). No behavior change for valid inputs.
Repro (example):
BrotliInputStream.read(...) -> Decode.decompress(...) -> Utils.makeError(...) throws IllegalStateException("Brotli error code: -22")