https://issues.dlang.org/show_bug.cgi?id=18232
Issue ID: 18232 Summary: string variable in toString method of Union: invalid code (crash/segfault) Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: kde...@vogtner.de crash.d --- import std.stdio; union U { float f; int i; string toString () { string s; return s; } } void main () { U u; writeln (u); } --- $ dmd crash $ dmd std.exception.ErrnoException@/.../dmd2/linux/bin64/../../src/phobos/std/stdio.d(2776): (Bad address) ---------------- ??:? @safe int std.exception.errnoEnforce!(int, "/.../dmd2/linux/bin64/../../src/phobos/std/stdio.d", 2776uL).errnoEnforce(int, lazy immutable(char)[]) [0x43f20a] ??:? @safe void std.stdio.File.LockingTextWriter.put!(immutable(char)[]).put(immutable(char)[]) [0x4422a7] ??:? @safe void std.range.primitives.doPut!(std.stdio.File.LockingTextWriter, immutable(char)[]).doPut(ref std.stdio.File.LockingTextWriter, ref immutable(char)[]) [0x44224b] ??:? @safe void std.range.primitives.put!(std.stdio.File.LockingTextWriter, immutable(char)[]).put(ref std.stdio.File.LockingTextWriter, immutable(char)[]) [0x44222b] ??:? void std.format.formatObject!(std.stdio.File.LockingTextWriter, crash.U, char).formatObject(ref std.stdio.File.LockingTextWriter, ref crash.U, ref const(std.format.FormatSpec!(char).FormatSpec)) [0x44220a] ??:? void std.format.formatValue!(std.stdio.File.LockingTextWriter, crash.U, char).formatValue(ref std.stdio.File.LockingTextWriter, ref crash.U, ref const(std.format.FormatSpec!(char).FormatSpec)) [0x44219d] ??:? uint std.format.formattedWrite!(std.stdio.File.LockingTextWriter, char, crash.U).formattedWrite(ref std.stdio.File.LockingTextWriter, const(char[]), crash.U) [0x43e703] ??:? void std.stdio.File.write!(crash.U, char).write(crash.U, char) [0x43e3f5] ??:? void std.stdio.writeln!(crash.U).writeln(crash.U) [0x43e389] ??:? _Dmain [0x43e344] http://forum.dlang.org/thread/wrasraxuptrqwakrs...@forum.dlang.org --