fix(core): Fix OpenAI SDK private field access by binding non-instrumented fns #17163
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RulaKhaled
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Jul 25, 2025
…ented fns (#17163) The OpenAI SDK v5 uses ES private class fields (e.g. #baseURL), which can only be accessed when methods are called with the correct this context. In our instrumentation, methods that are not explicitly instrumented (i.e. skipped by shouldInstrument) were returned unbound, which broke calls to internal OpenAI methods like .parse() by triggering: TypeError: Cannot read private member from an object whose class did not declare it. This PR fixes that by explicitly binding all non-instrumented functions to their original instance (value.bind(obj)), ensuring correct this context and avoiding runtime errors when accessing private fields. (cherry picked from commit 8b2c685)
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The OpenAI SDK v5 uses ES private class fields (e.g. #baseURL), which can only be accessed when methods are called with the correct this context. In our instrumentation, methods that are not explicitly instrumented (i.e. skipped by shouldInstrument) were returned unbound, which broke calls to internal OpenAI methods like .parse() by triggering:
TypeError: Cannot read private member from an object whose class did not declare it.
This PR fixes that by explicitly binding all non-instrumented functions to their original instance (value.bind(obj)), ensuring correct this context and avoiding runtime errors when accessing private fields.