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-rw-r--r--gcc/fortran/intrinsic.texi1
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/fortran/intrinsic.texi b/gcc/fortran/intrinsic.texi
index fbe9938b0e3..496b8dad4a7 100644
--- a/gcc/fortran/intrinsic.texi
+++ b/gcc/fortran/intrinsic.texi
@@ -9870,6 +9870,7 @@ one or two.
type; otherwise, an array of @code{LOGICAL} type. The rank shall be one
or two, and the first (or only) dimension of @var{MATRIX_B} shall be
equal to the last (or only) dimension of @var{MATRIX_A}.
+@var{MATRIX_A} and @var{MATRIX_B} shall not both be rank one arrays.
@end multitable
@item @emph{Return value}: