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The previous approach would incorrectly invalidate the returned module values if another non-local exit occurred while dealing with a non-local exit. See Bug#65796. Instead, allocate the values from the usual environment storage, and return statically-allocated objects if that fails. * src/emacs-module.c (struct emacs_env_private): Turn non-local exit symbol and data into normal Lisp objects. (initialize_environment): Initialize them. (mark_module_environment): Prevent them from being garbage-collected. (module_signal_or_throw, module_non_local_exit_signal_1) (module_non_local_exit_throw_1): Adapt uses. (value_to_lisp): No longer scan for them with module assertions enabled. (module_out_of_memory_signal, module_out_of_memory_data): New statically-allocated module values to return in case of allocation failure. (syms_of_module): Initialize them. (module_non_local_exit_get): Allocate module values normally. If that fails, return statically-allocated values. * doc/lispref/internals.texi (Module Nonlocal): Document new behavior. |
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