Linus Groh 8e84ca6b16 LibJS: Don't apply arguments object hack to global execution context ...

Checking for the existence of a call frame is not enough to check if
we're in a function call, as the global execution context is a regular
call frame as well.

Found by OSS-Fuzz, where simply accessing "arguments" in the global
scope would crash due to call_frame().callee being an empty value
(https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32115).

2021-03-16 18:48:25 +01:00

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