Convert worker OOM to a fatal error.#11274
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erictraut merged 1 commit intomicrosoft:mainfrom Feb 7, 2026
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Diff from mypy_primer, showing the effect of this PR on open source code: sympy (https://github.com/sympy/sympy)
- .../projects/sympy/sympy/solvers/diophantine/diophantine.py:173:44 - error: Cannot access attribute "expand" for class "Basic"
- Attribute "expand" is unknown (reportAttributeAccessIssue)
- .../projects/sympy/sympy/solvers/diophantine/diophantine.py:528:23 - error: Operator "+" not supported for types "Generator[Unknown | Literal[1], Unknown, None] | list[Unknown | Literal[1]]" and "list[Unknown | int]"
+ .../projects/sympy/sympy/solvers/diophantine/diophantine.py:528:23 - error: Operator "+" not supported for types "Generator[Unknown | int, Unknown, None] | list[Unknown | int]" and "list[Unknown | int]"
- Operator "+" not supported for types "Generator[Unknown | Literal[1], Unknown, None]" and "list[Unknown | int]" (reportOperatorIssue)
+ Operator "+" not supported for types "Generator[Unknown | int, Unknown, None]" and "list[Unknown | int]" (reportOperatorIssue)
- .../projects/sympy/sympy/solvers/diophantine/tests/test_diophantine.py:313:30 - error: Cannot access attribute "as_independent" for class "Basic"
- Attribute "as_independent" is unknown (reportAttributeAccessIssue)
- .../projects/sympy/sympy/solvers/diophantine/tests/test_diophantine.py:382:30 - error: Cannot access attribute "as_independent" for class "Basic"
- Attribute "as_independent" is unknown (reportAttributeAccessIssue)
- .../projects/sympy/sympy/solvers/ode/hypergeometric.py:246:67 - error: Operator "**" not supported for types "Basic" and "Literal[2]" (reportOperatorIssue)
- .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:224:45 - error: Cannot access attribute "has" for class "tuple[Expr, int]"
- Attribute "has" is unknown (reportAttributeAccessIssue)
+ .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:222:22 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:222:25 - error: Argument of type "CRootOf | tuple[Expr, int]" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "CRootOf | tuple[Expr, int]" is not assignable to type "Expr"
+ "tuple[Expr, int]" is not assignable to "Expr" (reportArgumentType)
+ .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:237:40 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:237:50 - error: Argument of type "CRootOf | tuple[Expr, int]" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
+ Type "CRootOf | tuple[Expr, int]" is not assignable to type "Expr"
+ "tuple[Expr, int]" is not assignable to "Expr" (reportArgumentType)
- .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:467:28 - error: Argument of type "Expr | Unknown | None" cannot be assigned to parameter "expr" of type "Expr" in function "make_args"
+ .../projects/sympy/sympy/solvers/ode/nonhomogeneous.py:467:28 - error: Argument of type "Unknown | None" cannot be assigned to parameter "expr" of type "Expr" in function "make_args"
- Type "Expr | Unknown | None" is not assignable to type "Expr"
+ Type "Unknown | None" is not assignable to type "Expr"
- .../projects/sympy/sympy/solvers/ode/ode.py:1515:38 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1516:38 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1526:9 - error: No overloads for "update" match the provided arguments (reportCallIssue)
- .../projects/sympy/sympy/solvers/ode/ode.py:1526:12 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:1526:19 - error: Argument of type "Unknown | dict[Unknown, Unknown] | None" cannot be assigned to parameter "m" of type "Iterable[tuple[str, Unknown]]" in function "update"
- Type "Unknown | dict[Unknown, Unknown] | None" is not assignable to type "Iterable[tuple[str, Unknown]]"
- "None" is incompatible with protocol "Iterable[tuple[str, Unknown]]"
- "__iter__" is not present (reportArgumentType)
- .../projects/sympy/sympy/solvers/ode/ode.py:1533:43 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1533:64 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1539:9 - error: No overloads for "update" match the provided arguments (reportCallIssue)
- .../projects/sympy/sympy/solvers/ode/ode.py:1539:12 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:1539:19 - error: Argument of type "Unknown | dict[Unknown, Unknown] | None" cannot be assigned to parameter "m" of type "Iterable[tuple[str, Unknown]]" in function "update"
- Type "Unknown | dict[Unknown, Unknown] | None" is not assignable to type "Iterable[tuple[str, Unknown]]"
- "None" is incompatible with protocol "Iterable[tuple[str, Unknown]]"
- "__iter__" is not present (reportArgumentType)
- .../projects/sympy/sympy/solvers/ode/ode.py:1546:43 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1546:74 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1552:9 - error: No overloads for "update" match the provided arguments (reportCallIssue)
- .../projects/sympy/sympy/solvers/ode/ode.py:1552:12 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:1552:19 - error: Argument of type "Unknown | dict[Unknown, Unknown] | None" cannot be assigned to parameter "m" of type "Iterable[tuple[str, Unknown]]" in function "update"
- Type "Unknown | dict[Unknown, Unknown] | None" is not assignable to type "Iterable[tuple[str, Unknown]]"
- "None" is incompatible with protocol "Iterable[tuple[str, Unknown]]"
- "__iter__" is not present (reportArgumentType)
- .../projects/sympy/sympy/solvers/ode/ode.py:1559:49 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:1559:70 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
+ .../projects/sympy/sympy/solvers/ode/ode.py:1689:36 - error: Cannot access attribute "lhs" for class "Expr"
+ Attribute "lhs" is unknown (reportAttributeAccessIssue)
+ .../projects/sympy/sympy/solvers/ode/ode.py:1689:55 - error: Cannot access attribute "rhs" for class "Expr"
+ Attribute "rhs" is unknown (reportAttributeAccessIssue)
+ .../projects/sympy/sympy/solvers/ode/ode.py:1690:36 - error: Cannot access attribute "lhs" for class "Expr"
+ Attribute "lhs" is unknown (reportAttributeAccessIssue)
+ .../projects/sympy/sympy/solvers/ode/ode.py:1691:17 - error: No overloads for "__setitem__" match the provided arguments (reportCallIssue)
+ .../projects/sympy/sympy/solvers/ode/ode.py:1691:17 - error: Argument of type "Equality | BooleanFalse | BooleanTrue | Unknown | Expr" cannot be assigned to parameter "value" of type "Equality | BooleanFalse | BooleanTrue" in function "__setitem__"
+ Type "Equality | BooleanFalse | BooleanTrue | Unknown | Expr" is not assignable to type "Equality | BooleanFalse | BooleanTrue"
+ Type "Expr" is not assignable to type "Equality | BooleanFalse | BooleanTrue"
+ "Expr" is not assignable to "Equality"
+ "Expr" is not assignable to "BooleanFalse"
+ "Expr" is not assignable to "BooleanTrue" (reportArgumentType)
- .../projects/sympy/sympy/solvers/ode/ode.py:3378:7 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:3378:38 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3379:7 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:3379:38 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3380:14 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3381:14 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3382:14 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3394:50 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3395:50 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3396:50 - error: Object of type "None" is not subscriptable (reportOptionalSubscript)
- .../projects/sympy/sympy/solvers/ode/ode.py:3436:5 - error: No overloads for "update" match the provided arguments (reportCallIssue)
- .../projects/sympy/sympy/solvers/ode/ode.py:3436:7 - error: "update" is not a known attribute of "None" (reportOptionalMemberAccess)
- .../projects/sympy/sympy/solvers/ode/ode.py:3436:14 - error: Argument of type "Unknown | dict[Unknown, Unknown] | None" cannot be assigned to parameter "m" of type "Iterable[tuple[str, Unknown]]" in function "update"
- Type "Unknown | dict[Unknown, Unknown] | None" is not assignable to type "Iterable[tuple[str, Unknown]]"
- "None" is incompatible with protocol "Iterable[tuple[str, Unknown]]"
- "__iter__" is not present (reportArgumentType)
... (truncated 1245 lines) ...
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We can attach an exit handler to the child process and detect when an exit was unexpected. In that situation, we report a fatal error exit code.
Closes #11253.