Broken in 1.19

[shawnsmithdev]

This breaks in 1.19. It is a mystery.

sps@hikari:~/gosrc/wbtree$ git status
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
sps@hikari:~/gosrc/wbtree$ go version
go version go1.18.6 linux/amd64
sps@hikari:~/gosrc/wbtree$ go test -v
=== RUN   TestTreeGet
--- PASS: TestTreeGet (0.00s)
=== RUN   TestTreeReplace
--- PASS: TestTreeReplace (0.00s)
=== RUN   TestTreeInsert
--- PASS: TestTreeInsert (0.19s)
=== RUN   TestTree2Get
--- PASS: TestTree2Get (0.00s)
=== RUN   TestTree2Replace
--- PASS: TestTree2Replace (0.00s)
=== RUN   TestTree2Insert
--- PASS: TestTree2Insert (0.25s)
=== RUN   TestTree2Remove
--- PASS: TestTree2Remove (0.34s)
=== RUN   TestTree2ForEach
--- PASS: TestTree2ForEach (0.19s)
PASS
ok  	github.com/shawnsmithdev/wbtree	0.971s
sps@hikari:~/gosrc/wbtree$ rm ~/opt/go && ln -s ~/opt/go1.19 ~/opt/go
sps@hikari:~/gosrc/wbtree$ go version
go version go1.19 linux/amd64
sps@hikari:~/gosrc/wbtree$ go test -v
# github.com/shawnsmithdev/wbtree [github.com/shawnsmithdev/wbtree.test]
./tree.go:277:11: internal compiler error: method Cmp on *uint8 not found

Please file a bug report including a short program that triggers the error.
https://go.dev/issue/new
FAIL	github.com/shawnsmithdev/wbtree [build failed]

[shawnsmithdev]

I'm far from certain but I suspect this may be the cause...

golang/go#54243

and the incoming fix

golang/go@16c2b36

[shawnsmithdev]

I failed to notice that there actually has been a 1.19.1 release. I should, you know, check if that fix is in.

[shawnsmithdev]

That... doesn't seem to fix it? Hmm. Is it a different compiler bug, of which there seem to have been several in go1.19? The fact remains that in go1.18 this code compiles and tests fine, so either it is a compiler bug, or there is some code that is invalid in some way that 1.18 improperly allowed, but it literally says "internal" compiler error, so I suspect its the former.

sps@hikari:~/gosrc/wbtree$ go test -v
# github.com/shawnsmithdev/wbtree [github.com/shawnsmithdev/wbtree.test]
./tree.go:277:11: internal compiler error: method Cmp on *uint8 not found

Please file a bug report including a short program that triggers the error.
https://go.dev/issue/new
FAIL	github.com/shawnsmithdev/wbtree [build failed]
sps@hikari:~/gosrc/wbtree$ go version
go version go1.19.1 linux/amd64

[shawnsmithdev]

Well something happened between then and now, as of go1.19.3 this works again, closing this issue.

sps@hikari:~/gosrc/wbtree$ git pull
Already up to date.
sps@hikari:~/gosrc/wbtree$ git status
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
sps@hikari:~/gosrc/wbtree$ go version
go version go1.19.3 linux/amd64
sps@hikari:~/gosrc/wbtree$ go test -v
=== RUN   TestTreeGet
--- PASS: TestTreeGet (0.00s)
=== RUN   TestTreeReplace
--- PASS: TestTreeReplace (0.00s)
=== RUN   TestTreeInsert
--- PASS: TestTreeInsert (0.18s)
=== RUN   TestTree2Get
--- PASS: TestTree2Get (0.00s)
=== RUN   TestTree2Replace
--- PASS: TestTree2Replace (0.00s)
=== RUN   TestTree2Insert
--- PASS: TestTree2Insert (0.23s)
=== RUN   TestTree2Remove
--- PASS: TestTree2Remove (0.34s)
=== RUN   TestTree2ForEach
--- PASS: TestTree2ForEach (0.17s)
PASS
ok  	github.com/shawnsmithdev/wbtree	0.923s