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      1 // RUN: not %clang_cc1 -fmodules -fmodules-cache-path=%t -fmodule-map-file=%S/Inputs/diagnostics-aux.modulemap -fmodule-map-file=%s -fsyntax-only -x c++ /dev/null 2>&1 | FileCheck %s
      2 
      3 // CHECK: In file included from {{.*}}diagnostics-aux.modulemap:3:
      4 // CHECK: diagnostics-aux-2.modulemap:2:3: error: expected
      5 
      6 // PR22299: Ensure we can produce diagnostics for duplicate modules from -fmodule-map-file=.
      7 //
      8 // CHECK: diagnostics.modulemap:[[@LINE+2]]:8: error: redefinition of module 'foo'
      9 // CHECK: diagnostics-aux.modulemap:1:8: note: previously defined here
     10 module foo {}
     11 
     12 //* Check that we accept BCPL comments properly, not just as an extension. */
     13 
     14 module bad_use {
     15   // CHECK: diagnostics.modulemap:[[@LINE+1]]:22: error: use declarations are only allowed in top-level modules
     16   module submodule { use foo }
     17 }
     18