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-rw-r--r--test-suite/bugs/closed/bug_14011.v23
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diff --git a/test-suite/bugs/closed/bug_14011.v b/test-suite/bugs/closed/bug_14011.v
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+++ b/test-suite/bugs/closed/bug_14011.v
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+(** Test that Ltac2 Array.init doesn't compute the first argument twice, and has the correct asymptotics when nested *)
+Require Import Ltac2.Ltac2.
+Ltac2 Type rec singleton := [ Single (int) | Arr (singleton array) ].
+Ltac2 rec init_rec (n : int) :=
+ match Int.equal n 0 with
+ | true => Single 0
+ | false => Arr (Array.init 1 (fun _ => init_rec (Int.sub n 1)))
+ end.
+Ltac2 rec timing (n : int) :=
+ (match Int.equal n 0 with
+ | true => ()
+ | false => timing (Int.sub n 1)
+ end;
+ Message.print (Message.concat (Message.of_int n) (Message.of_string ": "));
+ let _ := Control.time None (fun _ => init_rec n) in
+ ()).
+(** Should take less than 0.1 seconds if the asymptotics are correct.
+Previous behavior was to take an expected 1 million times the age of
+the universe. Capping the time at 100 seconds seems like a reasonable
+middle ground between these times, as I expect that compilation of Coq
+itself will not finish in reasonable time if the computer is running
+1000x slower than modern machines. *)
+Timeout 100 Ltac2 Eval timing 100.