Deprecated function Call.PC() breaks tinygo compatibility?

[dkegel-fastly]

Following a rabbit hole of dependencies that starts at tinygo-org/tinygo#2153, I noticed that

$ git clone https://github.com/go-stack/stack
$ cd stack
$ go test

succeeds, but

$ tinygo test

fails with

stack.go:164:17: c.frame.PC undefined (type runtime.Frame has no field or method PC)

That's

162 // Deprecated: Use Call.Frame instead.
163 func (c Call) PC() uintptr {
164         return c.frame.PC
165 }

So for what it's worth, the deprecated function Call.PC() is causing tinygo build failure. Commenting it out lets tinygo test pass.

[ChrisHines]

Indeed. Tinygo's runtime.Frame type is not fully compatible with Go's runtime.Frame type. It is missing several fields.

The best solution here is to move func (c Call) PC() uintptr into a separate file that specifies a !tinygo build tag.

Would you like to submit a PR for that?

[dkegel-fastly]

I must have been smoking something. Fixing that one problem uncovers another one now:

stack_test.go:580:6: fn.FileLine undefined (type *runtime.Func has no field or method FileLine)

so maybe it's best to leave sleeping dogs lie for a bit, until the need for a fix is stronger.

[ChrisHines]

Sure. Tinygo's runtime package is quite a bit smaller than Go's, so any code that depends on runtime is likely to have issues like this.