The following source code doesn't compile because in the lambda 'a.bar' is written instead of 'a.foo'.

import std.algorithm: canFind;

struct A { string foo; }

void main()
{
	A[] arr;
	arr.canFind!(a => a.bar);
}

It isn't clear from the error message, that the property'bar' is causing the error:

source\app.d(9): 
Error: template std.algorithm.canFind cannot deduce function
from argument types !((a) => a.bar)(A[]), candidates are:
C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm.d(11266):        std.algorithm.canFind(alias pred = "a == b")

I would expect an error message: no property 'bar' for type 'A'