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leanprover
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invalidPatternIssue.lean.expected.out
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invalidPatternIssue
.
lean
:
13
:
0
-
13
:
20
:
error
:
invalid patterns
,
`x`
is
an
explicit
pattern variable
,
but it only occurs
in
positions that are inaccessible to pattern matching
{
pred
:=
Nat
.
succ
.(
x
.
1
)
}