77dc203cd0
It's possible to define a procedure that has a procedure dummy argument which names the procedure that contains it. This was causing the compiler to fall into an infinite loop when characterizing a call to the procedure. Following a suggestion from Peter, I fixed this be maintaining a set of procedure symbols that had already been seen while characterizing a procedure. This required passing a new parameter to the functions that characterized a Procedure, a DummyArgument, and a DummyProcedure. I also added several tests that will crash the compiler without this change. Differential Revision: https://reviews.llvm.org/D96631
66 lines
1.4 KiB
Fortran
66 lines
1.4 KiB
Fortran
! RUN: %S/test_errors.sh %s %t %f18
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! Tests for circularly defined procedures
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!ERROR: Procedure 'sub' is recursively defined. Procedures in the cycle: ''sub', 'p2''
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subroutine sub(p2)
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PROCEDURE(sub) :: p2
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call sub()
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end subroutine
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subroutine circular
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!ERROR: Procedure 'p' is recursively defined. Procedures in the cycle: ''p', 'sub', 'p2''
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procedure(sub) :: p
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call p(sub)
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contains
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subroutine sub(p2)
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procedure(p) :: p2
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end subroutine
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end subroutine circular
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program iface
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!ERROR: Procedure 'p' is recursively defined. Procedures in the cycle: ''p', 'sub', 'p2''
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procedure(sub) :: p
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interface
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subroutine sub(p2)
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import p
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procedure(p) :: p2
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end subroutine
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end interface
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call p(sub)
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end program
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Program mutual
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Procedure(sub1) :: p
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Call p(sub)
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contains
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!ERROR: Procedure 'sub1' is recursively defined. Procedures in the cycle: ''p', 'sub1', 'arg''
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Subroutine sub1(arg)
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procedure(sub1) :: arg
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End Subroutine
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Subroutine sub(p2)
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Procedure(sub1) :: p2
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End Subroutine
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End Program
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Program mutual1
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Procedure(sub1) :: p
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Call p(sub)
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contains
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!ERROR: Procedure 'sub1' is recursively defined. Procedures in the cycle: ''p', 'sub1', 'arg', 'sub', 'p2''
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Subroutine sub1(arg)
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procedure(sub) :: arg
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End Subroutine
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Subroutine sub(p2)
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Procedure(sub1) :: p2
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End Subroutine
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End Program
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