func (A4) m() {} // ERROR "cannot define new methods on non-local type|may not define methods on non-local type"

type B1 = struct{}

func (B1) m() {} // ERROR "invalid receiver type"

        createDirs("buildSrc", "buildSrc/b1", "buildSrc/b2")
        file("buildSrc/settings.gradle") << """
            $settings
            include 'b1', 'b2'
        """

        file("buildSrc/build.gradle") << """
            allprojects { apply plugin: 'java' }
            dependencies { implementation project(':b1') }
            project(':b1') { dependencies { implementation project(':b2') } }

000000e0  20 16 52 fb 12 04 17 48  7d 65 49 50 c5 b8 e6 9c  | .R....H}eIP....|
000000f0  be f6 58 09 ea 8b 94 51  93 cf 0d 7a 76 88 78 cb  |..X....Q...zv.x.|
00000100  37 83 43 fa 37 d5 5b 3f  10 1d 07 b1 bb 9b ac 3a  |7.C.7.[?.......:|
00000110  43 e0 62 b1 fe 64 43 83  53 49 96 9e 81 1c 05 64  |C.b..dC.SI.....d|
00000120  40 2a 1b 98 5f ed 8d 47  52 2c db 84 8b 6a 1e 3b  |@*.._..GR,...j.;|

00000210  38 a3 9c 15 3f 0e cc 63  43 8f b0 c1 14 97 ee 85  |8...?..cC.......|
00000220  30 08 b1 95 0c 7f 5b 95  4d 4f 18 26 d8 45 cb b4  |0.....[.MO.&.E..|
00000230  b7 1b f5 a5 d5 e5 21 da  53 88 57 09 ed 30 fe d1  |......!.S.W..0..|
00000240  ac ee c7 80 ee a9 96 31  92 4c a1 e2 2c a8 f5 b1  |.......1.L..,...|
00000250  d9 3c bd c8 e6 1b ba 7c  91 d6 6c d4 ae 0a 15 50  |.<.....|..l....P|

00000020  41 74 2e b1 65 cd c6 93  06 71 f0 25 20 21 c5 1b  |At..e....q.% !..|
00000030  d2 ea eb e4 06 15 03 02  00 30 00 00 00 00 00 00  |.........0......|
00000040  00 00 00 00 00 00 00 00  00 00 1e a9 c0 dc d8 23  |...............#|
00000050  f2 08 b0 c5 b2 2e 53 9b  23 50 8a 02 c6 41 9a 36  |......S.#P...A.6|

    private static final String GROUP_ID = "test";

    // fields -----------------------------------------------------------------

    protected Artifact a1;

    protected Artifact a2;

    protected Artifact b1;

    private final String roleHint;

    @Inject
    private ArtifactFactory artifactFactory;

    private ConflictResolver conflictResolver;

    @Inject
    protected PlexusContainer container;

000000a0  92 17 03 03 02 6d 2a 26  5c 45 13 5f 75 46 56 41  |.....m*&\E._uFVA|
000000b0  25 92 a1 6f cd 7b 01 e2  cb 76 81 4d 33 f0 9d d1  |%..o.{...v.M3...|
000000c0  0d db b1 90 1a a7 d9 a8  4a 79 b1 12 59 62 0d c8  |........Jy..Yb..|
000000d0  cc 92 16 26 27 3e 07 b6  8a 15 77 a8 f6 c3 02 e7  |...&'>....w.....|
000000e0  44 0d b5 d3 11 57 6b 81  15 7d 23 b3 91 82 21 3c  |D....Wk..}#...!<|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 13 03 00 00  |................|
00000050  2e 00 2b 00 02 03 04 00  33 00 24 00 1d 00 20 dd  |..+.....3.$... .|
00000060  be 27 eb a0 9c b1 22 6a  8c 29 9a d4 47 c2 ee 14  |.'...."j.)..G...|
00000070  39 0c 60 81 c9 06 3f dc  e5 e0 24 9a c4 88 35 14  |9.`...?...$...5.|
00000080  03 03 00 01 01 17 03 03  00 17 25 70 5a e5 6b 9e  |..........%pZ.k.|

00000260  3d 43 d3 2d d9 0b f2 97  df d3 20 64 38 92 24 3a  |=C.-...... d8.$:|
00000270  00 bc cf 9c 7d b7 40 20  01 5f aa d3 16 61 09 a2  |....}.@ ._...a..|
00000280  76 fd 13 c3 cc e1 0c 5c  ee b1 87 82 f1 6c 04 ed  |v......\.....l..|
00000290  73 bb b3 43 77 8d 0c 1c  f1 0f a1 d8 40 83 61 c9  |s..Cw.......@.a.|
000002a0  4c 72 2b 9d ae db 46 06  06 4d f4 c1 b3 3e c0 d1  |Lr+...F..M...>..|

00000250  5f f3 f4 f0 5c 1c d7 d3  a7 0c 8f 23 29 30 7a 8e  |_...\......#)0z.|
00000260  c3 aa a8 71 21 5c ad b6  fb c6 bd 78 ac ab b1 a0  |...q!\.....x....|
00000270  11 84 23 61 7b ec 90 e1  2c 23 ec 9b 21 c8 ab 01  |..#a{...,#..!...|
00000280  e0 b9 5b 0b 4c ee a5 3c  5b c0 52 bd 60 7a b1 88  |..[.L..<[.R.`z..|
00000290  67 e3 c9 60 b9 04 a8 31  3e 34 d7 33 49 38 d9 a7  |g..`...1>4.3I8..|