68409ef6fd
This PR prevents some nonsensical code from crashing the server. Specifically, the kernel is changed to - properly check that passed expressions do not contain loose bvars, which could lead to a segmentation fault on a well-crafted input (discovered through fuzzing), and - check that constants generated when creating a new inductive type do not overwrite each other, which could lead to the kernel taking something out of the environment and then casting it to something it isn't. Partially addresses #8258, but let's keep that one open until the error message is a little better. Fixes #10492. |
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