If a handler produces an error, cleanup code doesn’t get to run and leaves gbd-mi.el in a corrupted state (in terms of communication buffer). So other handlers can’t parse the message sent from gdb anymore.
unwind-protect.patch
Description: Binary data
In GNU Emacs 27.0.50 (build 3, x86_64-apple-darwin19.0.0, NS appkit-1894.10 Version 10.15.1 (Build 19B88)) of 2019-11-30 built on missSilver Repository revision: e2828795d73637577c7726965974a047fe2d7119 Repository branch: master Windowing system distributor 'Apple', version 10.3.1894 System Description: Mac OS X 10.15.2 Recent messages: Loading /Users/yuan/.emacs.d/star/org.el (source)...done Loading /Users/yuan/.emacs.d/star/tex.el (source)...done Loading /Users/yuan/.emacs.d/star/simple-mode.el (source)...done Loading /Users/yuan/.emacs.d/custom.el (source)...done Loading /Users/yuan/.emacsenv...done Starting new Ispell process aspell with default dictionary...done For information about GNU Emacs and the GNU system, type C-h C-a. Emacs ready in 0.90 seconds with 0 garbage collections. 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