File: string1.C

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gcc-arm-none-eabi 15%3A8-2019-q3-1
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// PR c++/35652
// { dg-options "-O -Wall" }

#include <string>
int test() {
  // blank line padding, could also be code...
  //
  //
  //
  //
  //
  //
  //
  //
  //
  std::string s = "";
  s += 'x' + "y";	      // { dg-warning "bounds of constant string" }

  return 0;
}

// With -std=c++17 we get another warning deep under operator+=.
// { dg-prune-output __builtin_memcpy }