https://issues.dlang.org/show_bug.cgi?id=14059
Issue ID: 14059 Summary: Formatted write with wrong formatting string Product: D Version: D2 Hardware: x86 OS: Windows Status: NEW Keywords: diagnostic Severity: minor Priority: P1 Component: Phobos Assignee: nob...@puremagic.com Reporter: bearophile_h...@eml.cc void main() { import std.stdio; auto a = ["red", "blue"]; writefln("%-(%s%", a); } If compiled normally gives (dmd 2.067alpha): core.exception.RangeError@std\format.d(878): Range violation Compiling with -release -boundscheck=off gives: object.Exception@...\dmd2\src\phobos\std\format.d(871): Incorrect format specifier: %(%s% I think it should give the second error message in both cases. --