Bad error message for method call on double pointer

[digitcrusher]

Zig Version

0.13.0-dev.75+5c9eb4081

Steps to Reproduce and Observed Behavior

const std = @import("std");

const Foo = struct {
  fn bar(self: *Foo) void {
    std.debug.print("{*}\n", .{self});
  }
};

pub fn main() !void {
  var gpa = std.heap.GeneralPurposeAllocator(.{}){};
  var map = std.AutoHashMap(*Foo, void).init(gpa.allocator());
  var key = Foo{};
  try map.put(&key, {});

  map.getKey(&key).?.*.bar(); // Does work
  map.getKey(&key).?.bar(); // Does work
  var it = map.keyIterator();
  while(it.next()) |foo| foo.*.bar(); // Does work
  while(it.next()) |foo| foo.bar(); // Doesn't work
}

…produces the following error:

code.zig:19:29: error: no field or member function named 'bar' in '*code.Foo'
  while(it.next()) |foo| foo.bar(); // Doesn't work
                         ~~~^~~~

Expected Behavior

The code already says it all.

[xdBronch]

this isnt a bug, the iterator returns pointers to the keys and your keys are *Foo so each foo is a double pointer, **Foo. field access and the like only go through 1 layer of pointer

[digitcrusher]

Oh, I see. In that case, the compiler error message has misled me…

[xdBronch]

yea that message could definitely be improved

[digitcrusher]

Then I suppose this issue should be assigned the "error message" label or closed if duplicate?

[Vexu]

Reduced example:

const S = struct { a: u32 };
pub export fn entry(a: **S) void {
    // _ = a.b(); // error: no field or member function named 'b' in '*a.S'
    _ = a.b; // error: type '**a.S' does not support field access
}