Ruff deserialization error

[NorthLake]

What happened?

Since 0.1.0-alpha-21, I get a MissingFieldException whenever ruff is executed by RyeCharm

Steps to reproduce

1. Install an older version of Ruff that does not have the severity property (I'm using 0.12.8)
2. Create a new project in PyCharm
3. The error will already occur on loading the first Python file
4. Type anything in a file to trigger ruff check and get the error again

Relevant log output or stack trace

error

kotlinx.serialization.MissingFieldException: Field 'severity' is required for type with serial name 'insyncwithfoo.ryecharm.ruff.linting.Diagnostic', but it was missing at path: $[0]
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:95)
	at kotlinx.serialization.encoding.AbstractDecoder.decodeSerializableValue(AbstractDecoder.kt:43)
	at kotlinx.serialization.encoding.AbstractDecoder.decodeSerializableElement(AbstractDecoder.kt:70)
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableElement(StreamingJsonDecoder.kt:168)
	at kotlinx.serialization.encoding.CompositeDecoder.decodeSerializableElement$default(Decoding.kt:539)
	at kotlinx.serialization.internal.CollectionLikeSerializer.readElement(CollectionSerializers.kt:80)
	at kotlinx.serialization.internal.AbstractCollectionSerializer.readElement$default(CollectionSerializers.kt:51)
	at kotlinx.serialization.internal.AbstractCollectionSerializer.merge(CollectionSerializers.kt:36)
	at kotlinx.serialization.internal.AbstractCollectionSerializer.deserialize(CollectionSerializers.kt:43)
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
	at kotlinx.serialization.json.Json.decodeFromString(Json.kt:149)
	at insyncwithfoo.ryecharm.ruff.linting.CheckKt.runCheckCommand(Check.kt:45)
	at insyncwithfoo.ryecharm.ruff.linting.RuffAnnotator.doAnnotate(RuffAnnotator.kt:83)
	at insyncwithfoo.ryecharm.ruff.linting.RuffAnnotator.doAnnotate(RuffAnnotator.kt:49)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.lambda$doAnnotate$1(ExternalToolPass.java:248)
	at com.intellij.codeInsight.daemon.impl.AnnotationSessionImpl.computeWithSession(AnnotationSessionImpl.java:91)
	at com.intellij.codeInsight.daemon.impl.AnnotationSessionImpl.computeWithSession(AnnotationSessionImpl.java:83)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:246)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:240)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$3(ExternalToolPass.java:198)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.runChangeAware(ExternalToolPass.java:313)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$5(ExternalToolPass.java:198)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$runUnderDisposeAwareIndicator$15(BackgroundTaskUtil.java:387)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:283)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$14(CoreProgressManager.java:744)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:819)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:775)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:743)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:87)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:267)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:382)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.run(ExternalToolPass.java:196)
	at com.intellij.util.ui.update.Update.execute$suspendImpl(Update.kt:61)
	at com.intellij.util.ui.update.Update.execute(Update.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates$suspendImpl(MergingUpdateQueue.kt:386)
	at com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates(MergingUpdateQueue.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invokeSuspend(MergingUpdateQueue.kt:345)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke(MergingUpdateQueue.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke(MergingUpdateQueue.kt)
	at com.intellij.util.SingleAlarm$scheduleTask$1$1$1$2.invokeSuspend(SingleAlarm.kt:413)
	at com.intellij.util.SingleAlarm$scheduleTask$1$1$1$2.invoke(SingleAlarm.kt)
	at com.intellij.util.SingleAlarm$scheduleTask$1$1$1$2.invoke(SingleAlarm.kt)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:67)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:43)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(Builders.common.kt:157)
	at kotlinx.coroutines.BuildersKt.withContext(Unknown Source)
	at com.intellij.util.SingleAlarm$scheduleTask$1$1.invokeSuspend(SingleAlarm.kt:411)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:610)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runDefaultDispatcherTask(CoroutineScheduler.kt:1194)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:906)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:775)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:762)
Caused by: kotlinx.serialization.MissingFieldException: Field 'severity' is required for type with serial name 'insyncwithfoo.ryecharm.ruff.linting.Diagnostic', but it was missing
	at kotlinx.serialization.internal.PluginExceptionsKt.throwMissingFieldException(PluginExceptions.kt:20)
	at insyncwithfoo.ryecharm.ruff.linting.Diagnostic.<init>(Results.kt:61)
	at insyncwithfoo.ryecharm.ruff.linting.Diagnostic$$serializer.deserialize(Results.kt:61)
	at insyncwithfoo.ryecharm.ruff.linting.Diagnostic$$serializer.deserialize(Results.kt:61)
	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
	... 53 more

stdout

[
  {
    "cell": null,
    "code": "D100",
    "end_location": {
      "column": 1,
      "row": 1
    },
    "filename": "C:\\Users\\user\\PycharmProjects\\PythonProject\\main.py",
    "fix": null,
    "location": {
      "column": 1,
      "row": 1
    },
    "message": "Missing docstring in public module",
    "noqa_row": 1,
    "url": "https://docs.astral.sh/ruff/rules/undocumented-public-module"
  },
  {
    "cell": null,
    "code": "ANN201",
    "end_location": {
      "column": 13,
      "row": 7
    },
    "filename": "C:\\Users\\user\\PycharmProjects\\PythonProject\\main.py",
    "fix": {
      "applicability": "unsafe",
      "edits": [
        {
          "content": " -> None",
          "end_location": {
            "column": 19,
            "row": 7
          },
          "location": {
            "column": 19,
            "row": 7
          }
        }
      ],
      "message": "Add return type annotation: `None`"
    },
    "location": {
      "column": 5,
      "row": 7
    },
    "message": "Missing return type annotation for public function `print_hi`",
    "noqa_row": 7,
    "url": "https://docs.astral.sh/ruff/rules/missing-return-type-undocumented-public-function"
  },
  {
    "cell": null,
    "code": "D103",
    "end_location": {
      "column": 13,
      "row": 7
    },
    "filename": "C:\\Users\\user\\PycharmProjects\\PythonProject\\main.py",
    "fix": null,
    "location": {
      "column": 5,
      "row": 7
    },
    "message": "Missing docstring in public function",
    "noqa_row": 7,
    "url": "https://docs.astral.sh/ruff/rules/undocumented-public-function"
  },
  {
    "cell": null,
    "code": "ANN001",
    "end_location": {
      "column": 18,
      "row": 7
    },
    "filename": "C:\\Users\\user\\PycharmProjects\\PythonProject\\main.py",
    "fix": null,
    "location": {
      "column": 14,
      "row": 7
    },
    "message": "Missing type annotation for function argument `name`",
    "noqa_row": 7,
    "url": "https://docs.astral.sh/ruff/rules/missing-type-function-argument"
  },
  {
    "cell": null,
    "code": "T201",
    "end_location": {
      "column": 10,
      "row": 9
    },
    "filename": "C:\\Users\\user\\PycharmProjects\\PythonProject\\main.py",
    "fix": {
      "applicability": "unsafe",
      "edits": [
        {
          "content": "pass",
          "end_location": {
            "column": 25,
            "row": 9
          },
          "location": {
            "column": 5,
            "row": 9
          }
        }
      ],
      "message": "Remove `print`"
    },
    "location": {
      "column": 5,
      "row": 9
    },
    "message": "`print` found",
    "noqa_row": 9,
    "url": "https://docs.astral.sh/ruff/rules/print"
  }
]

command
C:\Users\user\AppData\Local\Python\pythoncore-3.13-64\Scripts\ruff.exe check --no-fix --exit-zero --quiet - --output-format json --stdin-filename C:\Users\user\PycharmProjects\PythonProject\main.py --config C:\Users\user\path\to\custom\.ruff.toml

custom .ruff.toml

line-length = 150

[lint]
select = [
    "F", # pyflakes
    "E", # pycodestyle (Errors)
    "W", # pycodestyle (Warnings)
    "C90", # mccabe (complexity)
    "I", # isort
    "N", # pep8 naming
    "D", # pydocstyle
    "UP", # pyupgrade
    "ANN", # flake8-annotations
    "ASYNC", # flake8-async
    "A", # flake8-builtins
    "COM", # flake8-commas
    "C4", # flake8-comprehensions
    "DTZ", # flake8-datetimez
    "EM", # flake8-errmsg
    "EXE", # flake8-executable
    "ISC", # flake8-implicit-str-concat
    "ICN", # flake8-import-conventions
    "INP", # flake8-no-pep420
    "PIE", # flake8-pie
    "T20", # flake8-print
    "PYI", # flake8-pyi
    "PT", # flake8-pytest-style
    "Q", # flake8-quotes
    "RSE", # flake8-raise
    "RET", # flake8-return
    "SLF", # flake8-self
    "SLOT", # flake8-slot
    "SIM", # flake8-simplify
    "TID", # flake8-tidy-imports
    "INT", # flake8-gettext
    "ARG", # flake8-unused-arguments
    "ERA", # eradicate
    "PD", # pandas-vet
    "PGH", # pygrep-hooks
    "PL", # pylint
    "TRY", # tryceratops
    "FLY", # flyint
    "NPY", # NumPy-specific rules
    "AIR", # Airflow
    "PERF", # Perflint
    "RUF", # Ruff-specific rules
]
ignore = [
    # pydocstyle
    "D205", # Multi line module name
    "D401", # non-imperative-mood
    "D400", # ends-in-period
    "D404", # docstring-starts-with-this

    # flake8-commas
    "COM812", # missing-trailing-comma

    # flake8-implicit-str-concat (ISC)
    "ISC001", # implicit-str-concat-in-sequence

    # flake8-annotations
    "ANN003", # missing-type-kwargs

    # flake8-errmsg
    "EM101", # raw-string-in-exception
    "EM102", # f-string-in-exception

    # tryceratops
    "TRY003", # raise-vanilla-args

    # Ruff-specific rules (RUF)
    "RUF001", # ambiguous-unicode-character-string
    "RUF002", # ambiguous-unicode-character-docstring
    "RUF003", # ambiguous-unicode-character-comment

    # Ruff format compatibility (https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules)
    "W191", # tab-indentation
    "E111", # indentation-with-invalid-multiple
    "E114", # indentation-with-invalid-multiple-comment
    "E117", # over-indented
    "D206", # indent-with-spaces
    "D300", # triple-single-quotes
    "Q000", # bad-quotes-inline-string
    "Q001", # bad-quotes-multiline-string
    "Q002", # bad-quotes-docstring
    "Q003", # avoidable-escaped-quote
    "COM812", # missing-trailing-comma
    "COM819", # prohibited-trailing-comma
    "ISC001", # single-line-implicit-string-concatenation
    "ISC002", # multi-line-implicit-string-concatenation
    "EXE002", # shebang-missing-executable-file
]

extend-select = [
    "D417",  # undocumented-param
]

[format]
quote-style = "double"
indent-style = "space"
docstring-code-format = true

[lint.pylint]
max-args = 9

[lint.pydocstyle]
convention = "numpy"

Operating system

Windows

[InSyncWithFoo]

Duplicate of #205 (which is already fixed and released in v0.1.0-alpha-21). If there's a reason you can't update RyeCharm, a workaround is to use language server mode.

[NorthLake]

Apparently this is not a duplicate, because I'm still getting the error on v0.1.0-alpha-21.

[InSyncWithFoo]

@NorthLake RyeCharm 0.1.0-alpha-21 expects Ruff 0.15.8 and later. What does your ruff --version say?

Regardless, I suppose I should have considered backwards compatibility. I'll work on a fix later today or tomorrow.

[NorthLake]

As I said, I'm using 0.12.8.
We pinned the version back in the day for technical reasons, but should really look over that again...