❯ ./zig-cache/bin/zig astgen test.zig 
%38 = struct_decl({}, {}, {
  pub main: %15 = block_inline({
    %0 = error_union_type(@Ref.anyerror_type, @Ref.void_type) node_offset:1:23
    %1 = as_node(@Ref.type_type, %0) node_offset:1:23
    %14 = func([], %1, {
      %2 = dbg_stmt_node() node_offset:2:5
      %7 = block({
        %3 = decl_val("f") token_offset:2:9
        %4 = call_none(%3) node_offset:2:10
        %5 = is_err(%4) node_offset:2:10
        %6 = condbr(%5, {
          %8 = err_union_code(%4) node_offset:2:10
          %9 = ret_node(%8) node_offset:2:10
        }, {
          %10 = err_union_payload_unsafe(%4) node_offset:2:10
          %11 = break(%7, %10)
        }) node_offset:2:10
      }) node_offset:2:10
      %12 = ensure_result_used(%7) node_offset:2:5
      %13 = ret_coerce(@Ref.void_value) token_offset:3:1
    }) node_offset:1:5
    %16 = break_inline(%15, %14)
  }) node_offset:1:5
  pub f: %36 = block_inline({
    %17 = error_union_type(@Ref.anyerror_type, @Ref.void_type) node_offset:5:20
    %18 = as_node(@Ref.type_type, %17) node_offset:5:20
    %35 = func([], %18, {
      %19 = dbg_stmt_node() node_offset:6:5
      %20 = error_union_type(@Ref.anyerror_type, @Ref.u32_type) node_offset:6:22
      %21 = as_node(@Ref.type_type, %20) node_offset:6:22
      %22 = error_value("V") token_offset:6:35
      %23 = as_node(%21, %22) node_offset:6:29
      %24 = dbg_stmt_node() node_offset:7:7
      %27 = block({
        %25 = is_err(%23) node_offset:7:13
        %26 = condbr(%25, {
          %28 = err_union_code(%23) node_offset:7:13
          %29 = ret_node(%28) node_offset:7:13
        }, {
          %30 = err_union_payload_unsafe(%23) node_offset:7:13
          %31 = ensure_result_non_error(%30) node_offset:7:13
          %32 = break(%27, %30)
        }) node_offset:7:13
      }) node_offset:7:13
      %33 = ensure_result_non_error(%27) node_offset:7:13
      %34 = ret_coerce(@Ref.void_value) token_offset:8:1
    }) node_offset:5:5
    %37 = break_inline(%36, %35)
  }) node_offset:5:5
}) node_offset:1:1
zig/build on  stage2-whole-file-astgen [$!] via ↯ v0.8.0-dev.1982+d605f0275 via ❄️  impure 
❯ cat test.zig
pub fn main() anyerror!void {
    try f();
}

pub fn f() anyerror!void {
    const e: anyerror!u32 = error.V;
    _ = try e;
}