[all-commits] [llvm/llvm-project] 398fcf: [flang] Fix bug for forward referenced type

[Pete Steinfeld via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 398fcf224b8dd0968f27cdcc7e75bb0bc8ed6d09
      https://github.com/llvm/llvm-project/commit/398fcf224b8dd0968f27cdcc7e75bb0bc8ed6d09
  Author: Peter Steinfeld <psteinfeld at nvidia.com>
  Date:   2020-09-11 (Fri, 11 Sep 2020)

  Changed paths:
    M flang/lib/Semantics/symbol.cpp
    M flang/test/Semantics/bad-forward-type.f90

  Log Message:
  -----------
  [flang] Fix bug for forward referenced type

A type name in an IMPLICIT declaration that was later used in a PARAMETER
statement caused problems because the default symbol scope had not yet been
initialized.  I avoided dereferencing in the situation where the default scope
was uninitialized and added a test that triggers the problem.

Differential Revision: https://reviews.llvm.org/D87535