diff options
Diffstat (limited to 'src/LegacyArithmetic/BaseSystemProofs.v')
| -rw-r--r-- | src/LegacyArithmetic/BaseSystemProofs.v | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/LegacyArithmetic/BaseSystemProofs.v b/src/LegacyArithmetic/BaseSystemProofs.v index b87df814d..f0f0a80d2 100644 --- a/src/LegacyArithmetic/BaseSystemProofs.v +++ b/src/LegacyArithmetic/BaseSystemProofs.v @@ -122,7 +122,8 @@ Section BaseSystemProofs. end. rewrite (combine_truncate_r vs bs); apply (f_equal2 Z.add); trivial; []. unfold combine; break_match. - { apply (f_equal (@length _)) in Heql; simpl length in Heql; rewrite skipn_length in Heql; omega. } + { let Heql := match goal with H : _ = nil |- _ => H end in + apply (f_equal (@length _)) in Heql; simpl length in Heql; rewrite skipn_length in Heql; omega. } { cbv -[Z.add Z.mul]; ring_simplify; f_equal. assert (HH: nth_error (z0 :: l) 0 = Some z) by ( |