x/playground: fails to run program importing every package

[bradfitz]

Here's a program that empty imports every std package:

https://play.golang.org/p/AgKFdQv1pDV

It runs fine locally on linux/amd64 (13MB binary, 344KB heap alloc), but fails to even compile on the playground.

I get:

.dynsym: missing Go type information for global symbol: size 60
go.link.addmoduledata: relocation target runtime.addmoduledata not defined
_cgo_notify_runtime_init_done: relocation target x_cgo_notify_runtime_init_done not defined
_cgo_thread_start: relocation target x_cgo_thread_start not defined
runtime.cgo_yield: relocation target _cgo_yield not defined
.dynsym: relocation target _cgo_topofstack not defined
go.link.addmoduledatainit: phase error: addr=0x74db81 but sym=0x0 type=29

/cc @andybons @ianlancetaylor

[crawshaw]

The problem is the runtime/cgo package. This program fails to compile in the playground:

package main

import _ "runtime/cgo"

func main() {
}

https://play.golang.org/p/upwjplNDZos

[dgryski]

Removing runtime/cgo from the first example still has a build failure on the playground:

go.link.addmoduledata: relocation target runtime.addmoduledata not defined
go.link.addmoduledatainit: phase error: addr=0x74db41 but sym=0x0 type=29

https://play.golang.org/p/QbbmJKqHE1E

[crawshaw]

That's another bug from the plugin package, reproducible with:

package main

import _ "plugin"

func main() {
}

https://play.golang.org/p/jjf4ohv_KJ4

[bcmills]

Nice sleuthing. With those two notched out it works: https://play.golang.org/p/BbmnOc0m2Vc

[bradfitz]

Thanks. Let's still keep this open until we either fix or make the error message better.

[peterwaller-arm]

I am encountering errors of this form in a Go (1.24.2) binary which uses some cloud development kits. The binary is around 80 MiB in size. What was working fine suddenly stopped working without an obvious cause. Disabling cgo with CGO_ENABLED=0 has made it start working again.

runtime.gcdata: missing Go type information for global symbol .dynsym: size 72
net(.text): relocation target malloc not defined
net(.text): relocation target __errno_location not defined
net(.text): relocation target getnameinfo not defined
net(.text): relocation target __errno_location not defined
net(.text): relocation target getaddrinfo not defined
net(.text): relocation target free not defined
net(.text): relocation target freeaddrinfo not defined
net(.text): relocation target gai_strerror not defined
net(.text): relocation target res_search not defined
runtime/cgo(.text): relocation target stderr not defined
runtime/cgo(.text): relocation target fwrite not defined
runtime/cgo(.text): relocation target vfprintf not defined
runtime/cgo(.text): relocation target fputc not defined
runtime/cgo(.text): relocation target abort not defined
runtime/cgo(.text): relocation target pthread_mutex_lock not defined
runtime/cgo(.text): relocation target pthread_cond_wait not defined
runtime/cgo(.text): relocation target pthread_mutex_unlock not defined
runtime/cgo(.text): relocation target pthread_key_create not defined
runtime/cgo(.text): relocation target stderr not defined
runtime/cgo(.text): relocation target fprintf not defined