fix issue where an empty baseline file was being automatically created when running basedpyright from the CLI

[DetachHead]

No description provided.

[github-actions]

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

sympy (https://github.com/sympy/sympy)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/recurr.py:438:24 - error: Argument type is Any
+     Argument corresponds to parameter "bases" in function "__init__" (reportAny)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any))" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr))" (reportUnknownMemberType)
-     Type of "i_part" is "Unknown | Order | Any" (reportUnknownVariableType)
+     Type of "i_part" is "Unknown | Order | Any | Self@Expr" (reportUnknownVariableType)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any)) | Any" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr)) | Any" (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/simplex.py:272:13 - error: Type of "d" is partially unknown
+     Type of "d" is "Unknown | list[None]" (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/simplex.py:272:16 - error: Type of "p" is partially unknown
+     Type of "p" is "Unknown | list[None]" (reportUnknownVariableType)
-     Type of "ivl" is "Any | Unknown" (reportUnknownVariableType)
+     Type of "ivl" is "Unknown | Any" (reportUnknownVariableType)
-     Type of "as_set" is "Any | Unknown" (reportUnknownMemberType)
+     Type of "as_set" is "Any | (() -> Unknown) | Unknown" (reportUnknownMemberType)
-     Type of "sqrtdenest" is "(expr: Unknown, max_iter: int = 3) -> (Unknown | Mul | Pow | Order | Expr | Add | None)" (reportUnknownVariableType)
+     Type of "sqrtdenest" is "(expr: Unknown, max_iter: int = 3) -> Unknown" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:21 - error: Type of "b" is unknown (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:21 - error: Type of "b" is partially unknown
+     Type of "b" is "Mul | Unknown | Integer | Expr" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:24 - error: Type of "e" is unknown (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:24 - error: Type of "e" is partially unknown
+     Type of "e" is "Unknown | Expr | Mul | None" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:28 - error: Type of "as_base_exp" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:28 - error: Type of "as_base_exp" is partially unknown
+     Type of "as_base_exp" is "Unknown | (() -> (tuple[Mul, Unknown] | tuple[Mul, Expr | None])) | (() -> (tuple[Unknown | Integer, Unknown | Mul] | tuple[Expr, Expr])) | (() -> tuple[Expr, Expr])" (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2788:44 - error: "as_base_exp" is not a known attribute of "None" (reportOptionalMemberAccess)
-     Type of "check" is "list[Unknown]" (reportUnknownVariableType)
+     Type of "check" is "list[Unknown | Mul | Pow | Order | Expr | Add | None]" (reportUnknownVariableType)
-     Type of "extend" is "(iterable: Iterable[Unknown], /) -> None" (reportUnknownMemberType)
+     Type of "extend" is "(iterable: Iterable[Unknown | Mul | Pow | Order | Expr | Add | None], /) -> None" (reportUnknownMemberType)
-     Type of "extend" is "(iterable: Iterable[Unknown], /) -> None" (reportUnknownMemberType)
+     Type of "extend" is "(iterable: Iterable[Unknown | Mul | Pow | Order | Expr | Add | None], /) -> None" (reportUnknownMemberType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2793:21 - error: Type of "s" is unknown (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2793:21 - error: Type of "s" is partially unknown
+     Type of "s" is "Unknown | Mul | Pow | Order | Expr | Add | None" (reportUnknownVariableType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2794:44 - error: Argument type is unknown
-     Argument corresponds to parameter "sol" in function "checksol" (reportUnknownArgumentType)
-   /tmp/mypy_primer/projects/sympy/sympy/solvers/solvers.py:2798:36 - error: Argument type is unknown
-     Argument corresponds to parameter "object" in function "append" (reportUnknownArgumentType)
-     Type of "g" is "Unknown | Order | Any" (reportUnknownVariableType)
+     Type of "g" is "Unknown | Order | Any | Self@Expr" (reportUnknownVariableType)
-     Type of "h" is "Unknown | Order | Any" (reportUnknownVariableType)
+     Type of "h" is "Unknown | Order | Any | Self@Expr" (reportUnknownVariableType)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any))" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr))" (reportUnknownMemberType)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any))" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr))" (reportUnknownMemberType)
-     Type of "g" is "Unknown | Order | Basic | Any" (reportUnknownVariableType)
+     Type of "g" is "Unknown | Order | Basic | Self@Expr | Any" (reportUnknownVariableType)
-     Type of "h" is "Unknown | Order | Basic | Any" (reportUnknownVariableType)
+     Type of "h" is "Unknown | Order | Basic | Self@Expr | Any" (reportUnknownVariableType)
-     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any" (reportUnknownMemberType)
+     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any | ((...) -> (Unknown | Self@Expr | Basic))" (reportUnknownMemberType)
-     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any" (reportUnknownMemberType)
+     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any | ((...) -> (Unknown | Self@Expr | Basic))" (reportUnknownMemberType)
-     Type of "g" is "Unknown | Order | Any" (reportUnknownVariableType)
+     Type of "g" is "Unknown | Order | Any | Self@Expr" (reportUnknownVariableType)
-     Type of "h" is "Unknown | Order | Any" (reportUnknownVariableType)
+     Type of "h" is "Unknown | Order | Any | Self@Expr" (reportUnknownVariableType)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any))" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr))" (reportUnknownMemberType)
-     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any))" (reportUnknownMemberType)
+     Type of "expand" is "Unknown | ((deep: bool = True, modulus: Unknown | None = None, power_base: bool = True, power_exp: bool = True, mul: bool = True, log: bool = True, multinomial: bool = True, basic: bool = True, **hints: Unknown) -> (Unknown | Order | Any | Self@Expr))" (reportUnknownMemberType)
-     Type of "g" is "Unknown | Order | Basic | Any" (reportUnknownVariableType)
+     Type of "g" is "Unknown | Order | Basic | Self@Expr | Any" (reportUnknownVariableType)
-     Type of "h" is "Unknown | Order | Basic | Any" (reportUnknownVariableType)
+     Type of "h" is "Unknown | Order | Basic | Self@Expr | Any" (reportUnknownVariableType)
-     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any" (reportUnknownMemberType)
+     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any | ((...) -> (Unknown | Self@Expr | Basic))" (reportUnknownMemberType)
-     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any" (reportUnknownMemberType)
+     Type of "subs" is "Unknown | ((...) -> (Unknown | Order | Basic)) | Any | ((...) -> (Unknown | Self@Expr | Basic))" (reportUnknownMemberType)

... (truncated 494 lines) ...