wasm error running example

[goliatone]

Running the host-functions example I get the following error:

2022/11/12 14:42:05 Sending a HTTP request...
2022/11/12 14:42:05 wasm error: unreachable
wasm stack trace:
	.runtime.runtimePanic(i32,i32)
	.runtime.lookupPanic()
	.malloc(i32) i32 (recovered by wazero)
wasm stack trace:
	env.log(i32,i32) i64
	.greeter_greet(i32,i32) i64

• go version go1.18.7 darwin/arm64
• macOS 12.6.1
• Chip M1 Max

[knqyf263]

Which version did you try?

[knqyf263]

@codefromthecrypt Is it relevant to the recent update of wazero?

[mathetake]

it seems something to do with the memory management change in TinyGo, but haven't looked into yet

[mathetake]

maybe adds the test dimension with TinyGo versions since i see go-plugin is only tested with TinyGo 0.24 which is two versions behind the latest

[knqyf263]

@mathetake Thanks for your insight.
@goliatone Which version of TinyGo are you using?

[goliatone]

@knqyf263 tinygo version 0.26.0 darwin/amd64 (using go version go1.18.7 and LLVM version 14.0.0)

[mathetake]

I imagine this commit is the root cause tinygo-org/tinygo@03d1c44. since that commit (included in 0.26), passing size=0 to the malloc results in panic.

[mathetake]

cc @anuraaga

[mathetake]

#9 fixes!

[knqyf263]

@goliatone Do you mind trying the latest commit?

[codefromthecrypt]

I verified tinygo 0.26 works via #10 also

[anuraaga]

Thanks for the pointer, sent tinygo-org/tinygo#3303 to fix in TinyGo