• Enjoys Math (19/19) Dec 07 2015 Exception Message:
• Marc =?UTF-8?B?U2Now7x0eg==?= (6/25) Dec 07 2015 Works fine for me (Linux x86_64, DMD 2.069). Which version are
• Radu (4/23) Dec 07 2015 Are you running this in VisualD plugin? This is the only place I
• rumbu (9/28) Dec 07 2015 This is caused in fact by a correct unittest assertion in

Enjoys Math <enjoysmath gmail.com> writes:

Exception Message:
First-chance exception: std.format.FormatException Unterminated 
format specifier: "%" at 
C:\D\dmd2\windows\bin\..\..\src\phobos\std\format.d(828)

[CODE]
module set;
import std.conv;

struct Set(T) {
	string toString() const {
		auto str = "{";
		return str;
	}
}

unittest {
	import std.stdio;
	auto A = Set!int();
	writeln(A);
}
[/CODE]

Marc =?UTF-8?B?U2Now7x0eg==?= <schuetzm gmx.net> writes:

On Monday, 7 December 2015 at 08:17:27 UTC, Enjoys Math wrote:
 Exception Message:
 First-chance exception: std.format.FormatException Unterminated 
 format specifier: "%" at 
 C:\D\dmd2\windows\bin\..\..\src\phobos\std\format.d(828)

 [CODE]
 module set;
 import std.conv;

 struct Set(T) {
 	string toString() const {
 		auto str = "{";
 		return str;
 	}
 }

 unittest {
 	import std.stdio;
 	auto A = Set!int();
 	writeln(A);
 }
 [/CODE]

Works fine for me (Linux x86_64, DMD 2.069). Which version are 
you using exactly? Also, are you sure you're not accidentally 
running an outdated executable, or your executable doesn't 
actually match the code you posted? It doesn't invoke format at 
all.

Radu <radu void.null> writes:

On Monday, 7 December 2015 at 08:17:27 UTC, Enjoys Math wrote:
 Exception Message:
 First-chance exception: std.format.FormatException Unterminated 
 format specifier: "%" at 
 C:\D\dmd2\windows\bin\..\..\src\phobos\std\format.d(828)

 [CODE]
 module set;
 import std.conv;

 struct Set(T) {
 	string toString() const {
 		auto str = "{";
 		return str;
 	}
 }

 unittest {
 	import std.stdio;
 	auto A = Set!int();
 	writeln(A);
 }
 [/CODE]

Are you running this in VisualD plugin? This is the only place I 
get that exception. Running it from the command line works as 
expected on 2.069.1 win32

rumbu <rumbu rumbu.ro> writes:

On Monday, 7 December 2015 at 08:17:27 UTC, Enjoys Math wrote:
 Exception Message:
 First-chance exception: std.format.FormatException Unterminated 
 format specifier: "%" at 
 C:\D\dmd2\windows\bin\..\..\src\phobos\std\format.d(828)

 [CODE]
 module set;
 import std.conv;

 struct Set(T) {
 	string toString() const {
 		auto str = "{";
 		return str;
 	}
 }

 unittest {
 	import std.stdio;
 	auto A = Set!int();
 	writeln(A);
 }
 [/CODE]

This is caused in fact by a correct unittest assertion in 
format.d:

f = FormatSpec("a%%b%%c%");
w.clear();
assertThrown!FormatException(f.writeUpToNextSpec(w)); <-- here
assert(w.data == "a%b%c" && f.trailing == "%");

You can add std.Format.FormatException to the Exception Settings 
(Debug -> Exceptions) and  untick the Thrown checkbox.