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Subject: [Bug c++/55671] -Wconversion fails to warn for sign-conversion
Date: Thu, 13 Dec 2012 10:36:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55671

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-12-13 10:35:58 UTC ---
Surely this is by design, as documented:

  Warnings about conversions between signed and unsigned integers are
  disabled by default in C++ unless -Wsign-conversion is explicitly enabled.