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Diffstat (limited to 'test-suite/bugs/closed/bug_14011.v')
| -rw-r--r-- | test-suite/bugs/closed/bug_14011.v | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/bug_14011.v b/test-suite/bugs/closed/bug_14011.v new file mode 100644 index 0000000000..c1d3ce7a89 --- /dev/null +++ b/test-suite/bugs/closed/bug_14011.v @@ -0,0 +1,23 @@ +(** 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. |
