panics when compiling a script with syntax error

[shiyuge]

The following program sample.go triggers an unexpected result

package main

import (
	"context"
)

func main() {
	checkImpl(context)
}

func checkImpl(ctx context.Context) {
	// intentionally left blank
}

Expected result

# command-line-arguments
./sample.go:8:12: use of package context not in selector

Got

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
        panic: ./sample.go:8:2: CFG post-order panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x13d96e0]

goroutine 1 [running]:
github.com/traefik/yaegi/interp.(*Interpreter).cfg.func2.1()
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/cfg.go:601 +0x78
panic({0x19ef600, 0x219afc0})
        /usr/local/go/src/runtime/panic.go:890 +0x263
github.com/traefik/yaegi/interp.(*itype).assignableTo(0xc0003fa3c0, 0xc0003fa640)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/type.go:1465 +0x1a0
github.com/traefik/yaegi/interp.typecheck.assignment({0xc0003fa780?}, 0xc0003f92c0, 0x2383a68?, {0x0, 0x0})
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/typecheck.go:57 +0x1c5
github.com/traefik/yaegi/interp.typecheck.argument({0xc0001b22b8?}, {0xc0003f92c0?, 0x0?}, 0xc0003fa780, 0x0, 0x1, 0x0)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/typecheck.go:1015 +0x3cd
github.com/traefik/yaegi/interp.typecheck.arguments({0x0?}, 0x0?, {0xc00020ea78?, 0x1, 0x133d427?}, 0xc0003f9180, 0x0)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/typecheck.go:970 +0x292
github.com/traefik/yaegi/interp.(*Interpreter).cfg.func2(0xc0003f9040)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/cfg.go:1317 +0xaa4e
github.com/traefik/yaegi/interp.(*node).Walk(0xc0003f9040, 0xc0002218e8, 0xc000221930)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:294 +0xad
github.com/traefik/yaegi/interp.(*node).Walk(0xc0003f8f00, 0xc0002218e8, 0xc000221930)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:291 +0x75
github.com/traefik/yaegi/interp.(*node).Walk(0xc0003f8dc0, 0xc0002218e8, 0xc000221930)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:291 +0x75
github.com/traefik/yaegi/interp.(*node).Walk(0xc0003f8640, 0xc0002218e8, 0xc000221930)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:291 +0x75
github.com/traefik/yaegi/interp.(*node).Walk(0xc0003f8000, 0xc0002218e8, 0xc000221930)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:291 +0x75
github.com/traefik/yaegi/interp.(*Interpreter).cfg(0xc0001e58c0, 0xc0003f8000, 0xc0001e0510, {0xc0002c4898, 0x4}, {0xc0002c4898, 0x4})
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/cfg.go:62 +0x2b4
github.com/traefik/yaegi/interp.(*Interpreter).CompileAST(0xc0001e58c0, {0x1c95898?, 0xc0001e0360?})
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/program.go:97 +0x1ad
github.com/traefik/yaegi/interp.(*Interpreter).compileSrc(0xc0001e58c0, {0xc000290ab0?, 0x8f?}, {0x7ff7bfeff87b?, 0xc000186600?}, 0xb0?)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/program.go:64 +0xb8
github.com/traefik/yaegi/interp.(*Interpreter).eval(0xc0001e58c0, {0xc000290ab0?, 0x8f?}, {0x7ff7bfeff87b?, 0x200?}, 0x90?)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:556 +0x28
github.com/traefik/yaegi/interp.(*Interpreter).EvalPath(0xc0001e58c0, {0x7ff7bfeff87b, 0xb})
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/interp/interp.go:514 +0xab
main.runFile(0x7ff7bfeff87b?, {0x7ff7bfeff87b, 0xb}, 0x0)
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/cmd/yaegi/run.go:153 +0xee
main.run({0xc000198010?, 0x1, 0x1})
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/cmd/yaegi/run.go:116 +0xb9a
main.main()
        /Users/bytedance/go/pkg/mod/github.com/traefik/yaegi@v0.15.1/cmd/yaegi/yaegi.go:144 +0x2cb
exit status 2

Yaegi Version

v0.15.1

Additional Notes

No response