Bug 7613 – __traits(getMember) on inner unittest: Assertion failure: 'type' on line 6695 in file 'expression.c'

I was attempting to use is(typeof) or __traits(compiles) to tell if a field of a struct can be converted to a string. However when __traits(getMember) tries to return a unittest this causes an ICE: import std.conv; struct Foo { int x; unittest { } } void test(T)(T t) { foreach (member; __traits(allMembers, T)) { enum testString = "static if( is(typeof( to!string(__traits(getMember, t, " ~ `"` ~ member ~ `"` ~ "))) )) { };"; mixin(testString); } } void main() { Foo foo; test(foo); __traits(getMember, foo, "__unittest1"); } Assertion failure: 'type' on line 6695 in file 'expression.c' The minimal test-case is the last line: __traits(getMember, foo, "__unittest1"); If it was simply an error it could be caught with is(typeof), but it's an ICE.

It seems allMembers doesn't iterate through unittests anymore, not even getMember can fetch the unittest (compiling with -unittest).