Rust: fix macro expansion in library code #19945
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There was a mismatch between a `self.macro_context_level += 1` and the corresponding `self.macro_context_level -= 1`, which resulted in an `usize` underflow (panic in debug mode, wrong behaviour in release mode). This fixes it and adds a relevant assertion and test. In order to properly test library mode extraction, a special option enforcing that on source code as well is added.
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There was a mismatch between a
self.macro_context_level += 1and the correspondingself.macro_context_level -= 1, which resulted in anusizeunderflow (panic in debug mode, wrong behaviour in release mode).This fixes it and adds a relevant assertion and test. In order to properly test library mode extraction, a special option enforcing that on source code as well is added.