Workchains: Raise if if_/while_ predicate does not return boolean#259
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## support/0.21.x #259 +/- ##
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The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised.
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sphuber
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…259) The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised. Cherry-pick: 800bcf1
unkcpz
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Dec 14, 2024
…iidateam#259) The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised. Cherry-pick: 800bcf1
agoscinski
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Apr 13, 2026
…iidateam#259) The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised. Cherry-pick: 800bcf1
agoscinski
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Apr 13, 2026
…259) The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised. Cherry-pick: 800bcf1
agoscinski
pushed a commit
that referenced
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Apr 13, 2026
…259) The `if_` and `while_` conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered. The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the `while_` construct. Here the `_Conditional.is_true` method is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, a `TypeError` is raised. Cherry-pick: 800bcf1
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Fixes #258
The
if_andwhile_conditionals are constructed with a predicate. The interface expects the predicate to be a callable that returns a boolean, which if true, the body of the conditional is entered.The problem is that the type of the value returned by the predicate was not explicitly checked, and any value that would evaluate as truthy would be accepted. This could potentially lead to unexpected behavior, such as an infinite loop for the
while_construct.Here the
_Conditional.is_truemethod is updated to explicitly check the type of the value returned by the predicate. If anything but a boolean is returned, aTypeErroris raised.