fix baseline when running in multithreaded/background analysis mode

[DetachHead]

fixes #700

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

sympy (https://github.com/sympy/sympy)
-     Type of "_get_const_characteristic_eq_sols" is "(r: Unknown, func: Unknown, order: Unknown) -> tuple[list[Unknown], list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]]" (reportUnknownVariableType)
+     Type of "_get_const_characteristic_eq_sols" is "(r: Unknown, func: Unknown, order: Unknown) -> tuple[list[Unknown], list[tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]]" (reportUnknownVariableType)
-     Type of "collectterms" is "list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
+     Type of "collectterms" is "list[tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
-     Type of "collectterms" is "list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
+     Type of "collectterms" is "list[tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
-     Type of "collectterms" is "list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
+     Type of "collectterms" is "list[tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, Any, int] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, int]] | list[tuple[int, type[__class_UndefinedFunction] | Unknown, type[__class_UndefinedFunction] | Unknown] | tuple[int, type[__class_UndefinedFunction] | Unknown, int]]" (reportUnknownVariableType)
-     Type of "sqrtdenest" is "(expr: Unknown, max_iter: int = 3) -> Unknown" (reportUnknownVariableType)
+     Type of "sqrtdenest" is "(expr: Unknown, max_iter: int = 3) -> (Unknown | Mul | Pow | Order | Expr | Add | None)" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/ode/subscheck.py:385:22 - error: Type of "simplify" is partially unknown
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/ode/subscheck.py:385:22 - error: Type of "simplify" is unknown (reportUnknownMemberType)
-     Type of "simplify" is "Unknown | ((**kwargs: Unknown) -> Unknown)" (reportUnknownMemberType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/ode/subscheck.py:385:37 - error: "simplify" is not a known attribute of "None" (reportOptionalMemberAccess)
-     Type of "_" is "Unknown | Any | Literal[False]" (reportUnknownVariableType)
+     Type of "_" is "Unknown | Literal[False]" (reportUnknownVariableType)
-     Type of "_" is "Unknown | Any | Literal[False]" (reportUnknownVariableType)
+     Type of "_" is "Unknown | Literal[False]" (reportUnknownVariableType)
-     Type of "_" is "Unknown | Any | Literal[False]" (reportUnknownVariableType)
+     Type of "_" is "Unknown | Literal[False]" (reportUnknownVariableType)
-     Type of "_" is "Unknown | Any | Literal[False]" (reportUnknownVariableType)
+     Type of "_" is "Unknown | Literal[False]" (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:501:5 - error: Type of "eqs" is partially unknown
+     Type of "eqs" is "list[Unknown]" (reportUnknownVariableType)
-     Argument type is "Unknown | Any | _NotImplementedType" (reportUnknownArgumentType)
+     Argument type is "Unknown | _NotImplementedType" (reportUnknownArgumentType)
-     Type of "eqs" is "list[Unknown | Any]" (reportUnknownVariableType)
+     Type of "eqs" is "list[Unknown]" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:505:16 - error: Argument type is partially unknown
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:505:16 - error: Argument type is unknown
-     Argument corresponds to parameter "iterable" in function "__init__"
+     Argument corresponds to parameter "iterable" in function "__init__" (reportUnknownArgumentType)
-     Argument type is "Unknown | Any" (reportUnknownArgumentType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:717:18 - error: Argument type is unknown
+     Argument corresponds to parameter "f" in function "solve" (reportUnknownArgumentType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:1768:5 - error: Type of "eqs" is partially unknown
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:1768:5 - error: Type of "eqs" is unknown (reportUnknownVariableType)
-     Type of "eqs" is "Unknown | Any" (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:1769:18 - error: Argument type is unknown
+     Argument corresponds to parameter "f" in function "solve" (reportUnknownArgumentType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/tests/test_solvers.py:1770:18 - error: Argument type is unknown
+     Argument corresponds to parameter "f" in function "solve" (reportUnknownArgumentType)
+   /tmp/mypy_primer/projects/sympy/sympy/stats/tests/test_symbolic_multivariate.py:64:50 - error: Argument type is unknown
+     Argument corresponds to parameter "expr" in function "__new__" (reportUnknownArgumentType)
-     Type of "c" is "Unknown | Any | _NotImplementedType" (reportUnknownVariableType)
+     Type of "c" is "Unknown | _NotImplementedType" (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/utilities/tests/test_lambdify.py:634:29 - error: Argument type is unknown
+     Argument corresponds to parameter "expr" in function "lambdify" (reportUnknownArgumentType)
-     Type of "dot" is "(b: Unknown, hermitian: Unknown | None = None, conjugate_convention: Unknown | None = None) -> (Unknown | Any)" (reportUnknownMemberType)

... (truncated 17 lines) ...

spack (https://github.com/spack/spack)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/root/package.py:14:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/root/package.py:14:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/root-adds-virtual/package.py:14:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/root-adds-virtual/package.py:14:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/shell-a/package.py:17:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/shell-a/package.py:17:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:10:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:10:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:11:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:11:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:30:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/simple-inheritance/package.py:30:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/singlevalue-variant-dependent/package.py:17:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/singlevalue-variant-dependent/package.py:17:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/singlevalue-variant-dependent-type/package.py:19:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/singlevalue-variant-dependent-type/package.py:19:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/sombrero/package.py:16:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/sombrero/package.py:16:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-a/package.py:21:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-a/package.py:21:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-a/package.py:22:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-a/package.py:22:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-h/package.py:21:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-h/package.py:21:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-h/package.py:22:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-h/package.py:22:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-t/package.py:17:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-t/package.py:17:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-t/package.py:18:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-t/package.py:18:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-vh/package.py:21:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-vh/package.py:21:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-vh/package.py:22:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/splice-vh/package.py:22:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/sticky-variant-dependent/package.py:16:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
+   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/sticky-variant-dependent/package.py:16:5 - error: Result of call expression is of type "(pkg: PackageBase) -> None" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)
-   /tmp/mypy_primer/projects/spack/var/spack/repos/builtin.mock/packages/test-dep-with-imposed-conditions/package.py:17:5 - error: Result of call expression is of type "((pkg: PackageBase) -> None)" and is not used; assign to variable "_" if this is intentional (reportUnusedCallResult)

... (truncated 3 lines) ...