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From: | Lars Ingebrigtsen |
Subject: | bug#57957: 29.0.50; Native compilation hangs on cyclic lists |
Date: | Tue, 20 Sep 2022 17:33:55 +0200 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Lars Tveito <larstvei@ifi.uio.no> writes: > Evaluating the two following forms results in Emacs hanging: > > (defun test-cycle () > '#1=(a . #1#)) > > (native-compile 'test-cycle) It seems to be inflooping in comp-ssa-rename. A debug-on-quit backtrace included below. I've added Andrea to the CCs; perhaps he has some comments. Debugger entered--Lisp error: (quit) #f(compiled-function (x) #<bytecode -0xadd90b5d8edcf84>)((a . #1)) cl--nsublis-rec((a . #1)) cl--nsublis-rec(((a . #2))) cl--nsublis-rec((((a . #3)))) cl-nsublis(((nil . #s(comp-mvar :typeset (t) :valset nil :range nil : cl-nsubst-if(#s(comp-mvar :typeset (t) :valset nil :range nil :neg ni comp-ssa-rename-insn((setimm #s(comp-mvar :typeset (t) :valset nil :r #f(compiled-function (bb in-frame) #<bytecode -0xdf66bba587123ea>)(#s #f(compiled-function (bb in-frame) #<bytecode -0xdf66bba587123ea>)(#s comp-ssa-rename() #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_112>("F7465 comp-ssa() comp-fwprop(nil) funcall(comp-fwprop nil) (setq data (funcall pass data)) (if (memq pass comp-disabled-passes) (progn) (comp-log (format "(%s) (while (progn (setq t0 (current-time)) (consp --cl-var--)) (setq pass (let* ((report nil) (t0 nil) (--cl-var-- comp-passes) (pass nil) (--c ...
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