https://issues.dlang.org/show_bug.cgi?id=15586
Issue ID: 15586
Summary: std.utf.toUTF8() segfaults when fed an invalid dchar
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: phobos
Assignee: [email protected]
Reporter: [email protected]
Repro:
void main()
{
import std.utf : toUTF8;
char[4] buf = void;
auto b = toUTF8(buf, cast(dchar)0x110000);
import std.stdio;
writeln(b);
}
Cause:
toUTF8() asserts that invalid dchars just *don't exist*. It then proceeds to
return *nothing at all* when fed one, which violates memory safety.
Because of https://issues.dlang.org/show_bug.cgi?id=15585 the compiler may
optimize away attempts to fix this entirely.
--
