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-rw-r--r--test-suite/bugs/closed/bug_12889.v28
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+Require Import Relations.
+Require Import Setoid.
+Require Import Ring_theory.
+Require Import Ring_base.
+
+Section S1.
+Variable R : Type.
+Variable Rone Rzero : R.
+Variable Rplus Rmult Rminus : R -> R -> R.
+Variable Rneg : R -> R.
+
+Lemma my_ring_theory1 : @ring_theory R Rzero Rone Rplus Rmult Rminus Rneg (@eq
+R).
+Admitted.
+Add Ring my_ring : my_ring_theory1.
+End S1.
+
+Section S2.
+Variable R : Type.
+Variable Rone Rzero : R.
+Variable Rplus Rmult Rminus : R -> R -> R.
+Variable Rneg : R -> R.
+
+Lemma my_ring_theory2 : @ring_theory R Rzero Rone Rplus Rmult Rminus Rneg (@eq
+R).
+Admitted.
+Add Ring my_ring : my_ring_theory2.
+End S2.