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Introduce PartialRecursionDepthLimit - #552
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When evaluating templates with partials, it is possible to recurse in the evaluation of those partials. This can be useful for dealing with tree like data, such as rendering a list of friends-of-friends-of-friends-of-etc.... The ability to recurse can lead to stack overflows. For example if a sufficiently deep tree is provided as input data, or more simply if the partial calls itself in an infinite loop. As a stack overflow terminates the process, this is not desirable behaviour as it is an unavoidable crash. To resolve this a configurable PartialRecursionDepthLimit is introduced, defaulting to 100. Now when a template is evaluated a HandlebarsRuntimeException will be thrown if this limit is reached. This allows the caller to catch the exception and recover gracefully, rather than terminating the process.
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oformaniuk
approved these changes
Dec 14, 2023
oformaniuk
enabled auto-merge
April 1, 2024 01:39
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When evaluating templates with partials, it is possible to recurse in the evaluation of those partials. This can be useful for dealing with tree like data, such as rendering a list of friends-of-friends-of-friends-of-etc....
The ability to recurse can lead to stack overflows. For example if a sufficiently deep tree is provided as input data, or more simply if the partial calls itself in an infinite loop. As a stack overflow terminates the process, this is not desirable behaviour as it is an unavoidable crash.
To resolve this a configurable PartialRecursionDepthLimit is introduced, defaulting to 100. Now when a template is evaluated a HandlebarsRuntimeException will be thrown if this limit is reached. This allows the caller to catch the exception and recover gracefully, rather than terminating the process.