| Goal: | |
| T : Type b : bool t : T X : T | |
| ============================ | |
| (is_true true) | |
| DEBUG:Going to execute: | |
| PTRDEBUGTAC<coq-core.plugins.ssreflect::ssrtcldo@0> arg | |
| TcDebug (0) > /home/mdupont/.opam/4.14.1/lib/coq/theories/ssr/ssreflect.vdone:402, ssreflect (Coq.ssr),: (no location)NONE | |