Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

cmd/compile: panic on generic map literal #48537

Closed
rogpeppe opened this issue Sep 22, 2021 · 3 comments
Closed

cmd/compile: panic on generic map literal #48537

rogpeppe opened this issue Sep 22, 2021 · 3 comments

Comments

@rogpeppe
Copy link
Contributor

commit a83a558

I compiled the following program:

package main

func main() {
}

type C interface {
	map[int]string
}

func f[A C]() A {
	return A{
		1: "a",
		2: "b",
	}
}

I see the following panic:

./tst.go:11:10: internal compiler error: transformCompLit TYPEPARAM

goroutine 1 [running]:
runtime/debug.Stack()
	/home/rogpeppe/go/src/runtime/debug/stack.go:24 +0x65
cmd/compile/internal/base.FatalfAt({0xe49700, 0x0}, {0xce42bc, 0x13}, {0xc0000aee50, 0x1, 0x1})
	/home/rogpeppe/go/src/cmd/compile/internal/base/print.go:227 +0x154
cmd/compile/internal/base.Fatalf(...)
	/home/rogpeppe/go/src/cmd/compile/internal/base/print.go:196
cmd/compile/internal/noder.transformCompLit(0xc000134100)
	/home/rogpeppe/go/src/cmd/compile/internal/noder/transform.go:925 +0x271
cmd/compile/internal/noder.(*irgen).compLit(0xc00013c000, {0xe34dc0, 0xc0001145d0}, 0xc000124050)
	/home/rogpeppe/go/src/cmd/compile/internal/noder/expr.go:402 +0x259
cmd/compile/internal/noder.(*irgen).expr0(0xc00013c000, {0xe34dc0, 0xc0001145d0}, {0xe359e8, 0xc000124050})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/expr.go:107 +0x7ae
cmd/compile/internal/noder.(*irgen).expr(0xc00013c000, {0xe359e8, 0xc000124050})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/expr.go:81 +0x5ff
cmd/compile/internal/noder.(*irgen).exprs(0xc0000af378, {0xc0000af368, 0x1, 0xc000114000})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/expr.go:369 +0x8e
cmd/compile/internal/noder.(*irgen).exprList(0x40ce0b, {0xe359e8, 0xc000124050})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/expr.go:352 +0x85
cmd/compile/internal/noder.(*irgen).stmt(0xc00013c000, {0xe35dd8, 0xc000128160})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/stmt.go:130 +0x9c5
cmd/compile/internal/noder.(*irgen).stmts(0xc0001307e0, {0xc00011c040, 0x1, 0xc0000af6a0})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/stmt.go:19 +0xaf
cmd/compile/internal/noder.(*irgen).funcBody(0xc00013c000, 0xc00011e420, 0xb7151d, 0xc00012a080, 0xc00012a0c0)
	/home/rogpeppe/go/src/cmd/compile/internal/noder/func.go:45 +0x25f
cmd/compile/internal/noder.(*irgen).funcDecl.func1()
	/home/rogpeppe/go/src/cmd/compile/internal/noder/decl.go:128 +0x68
cmd/compile/internal/noder.(*irgen).generate(0xc00013c000, {0xc000072b60, 0x2, 0xb})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/irgen.go:262 +0x1df
cmd/compile/internal/noder.check2({0xc000072b60, 0x2, 0x2})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/irgen.go:93 +0x175
cmd/compile/internal/noder.LoadPackage({0xc00001e210, 0x2, 0x0})
	/home/rogpeppe/go/src/cmd/compile/internal/noder/noder.go:90 +0x335
cmd/compile/internal/gc.Main(0xd08420)
	/home/rogpeppe/go/src/cmd/compile/internal/gc/main.go:190 +0xaf3
main.main()
	/home/rogpeppe/go/src/cmd/compile/main.go:55 +0xdd
@rogpeppe
Copy link
Contributor Author

See also #45396

@danscales
Copy link
Contributor

Unusual case, but we can deal with this. I will probably wait to decide whether to fix based on the resolution of #48538 and #45396 .

@danscales danscales self-assigned this Sep 22, 2021
@gopherbot
Copy link

Change https://golang.org/cl/354354 mentions this issue: cmd/compile: allow delaying of transformCompLit, new transformAddr

@golang golang locked and limited conversation to collaborators Jun 23, 2023
Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Projects
None yet
Development

No branches or pull requests

3 participants