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Thomas Miedema authored
The Haskell 2010 report chapter 2.6 (Characters and String Literals) says: "Numeric escapes such as \137 are used to designate the character with decimal representation 137; octal (e.g. \o137) and hexadecimal (e.g. \x37) representations are also allowed." Commit 1c0b5fdc added syntax for writing character literals using binary notation (e.g. '\b100100'). But this code can never be reached, because '\b' already represents "backspace". Turn on -fwarn-overlapping-patterns to catch such bugs in the future. Reviewed by: hvr Differential Revision: https://phabricator.haskell.org/D1291
2eddcd9b