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      1 // RUN: %clang_profgen -o %t -O3 %s
      2 // RUN: touch %t.profraw
      3 // RUN: chmod -w %t.profraw
      4 // RUN: LLVM_PROFILE_FILE=%t.profraw LLVM_PROFILE_VERBOSE_ERRORS=1 %run %t 1 2>&1 | FileCheck %s
      5 // RUN: chmod +w %t.profraw
      6 
      7 int main(int argc, const char *argv[]) {
      8   if (argc < 2)
      9     return 1;
     10   return 0;
     11 }
     12 // CHECK: LLVM Profile: Failed to write file
     13