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[SR-15035] Encoding data with String.fastestEncoding seems to result in invalid JSON #3363

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franklinsch opened this issue Aug 6, 2021 · 0 comments
Open

[SR-15035] Encoding data with String.fastestEncoding seems to result in invalid JSON #3363

franklinsch opened this issue Aug 6, 2021 · 0 comments
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@franklinsch
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Previous ID SR-15035
Radar rdar://81608644
Original Reporter @franklinsch
Type Bug

Attachment: Download

Environment

Ubuntu 18.04 using the toolchain swift-5.5-DEVELOPMENT-SNAPSHOT-2021-08-04-a-ubuntu18.04, which has:

Swift version 5.5-dev (LLVM 4afce2110750060, Swift 4ae44a5e0eac8a0)
Target: x86_64-unknown-linux-gnu

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug
Assignee None
Priority Medium

md5: 413f2dd3d043273f63044f446290e2a6

Issue Description:

On Ubuntu 18.04 using the toolchain swift-5.5-DEVELOPMENT-SNAPSHOT-2021-08-04-a-ubuntu18.04, which has:
Swift version 5.5-dev (LLVM 4afce2110750060, Swift 4ae44a5e0eac8a0)
Target: x86_64-unknown-linux-gnu

I’m seeing this error when decoding a JSON string that’s been encoded with `fastestEncoding`:

Fatal error: 'try!' expression unexpectedly raised an error: Swift.DecodingError.dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Foundation.JSONError.unexpectedCharacter(ascii: 255, characterIndex: 0))))

See the attached program, which crashed on Ubuntu 18.04 but not macOS. The program doesn’t crash on Ubuntu when hardcoding `.utf8` instead of `string.fastestEncoding`.
@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@franklinsch