AST Output When Using Unsupported Keyworkds

[notJoon]

Description

Currently gno does not support go keyword. When this keyword is used in tests, it outputs the AST instead of an appropriate error message.

Reproduction

// add.go
package math

func Add(a, b int) int {
    return a + b
}

// add_test.go
package math

import "testing"

func TestAdd(t *testing.T) {
    go Add(1, 1)  // <- This line triggers AST output
}

Current Output

gno.land/r/gnoswap/v1/a0:0: unknown Go type *ast.GoStmt: (*ast.GoStmt)(0x14003f27480)({
 Go: (token.Pos) 268,
 Call: (*ast.CallExpr)(0x14000967300)({
  Fun: (*ast.Ident)(0x14007738f60)(Add),
  Lparen: (token.Pos) 274,
  Args: ([]ast.Expr) (len=2 cap=2) {
   (*ast.BasicLit)(0x14007738fa0)({
    ValuePos: (token.Pos) 275,
    Kind: (token.Token) INT,
    Value: (string) (len=1) "1"
   }),
   (*ast.BasicLit)(0x14007738fe0)({
    ValuePos: (token.Pos) 278,
    Kind: (token.Token) INT,
    Value: (string) (len=1) "1"
   })
  },
  Ellipsis: (token.Pos) 0,
  Rparen: (token.Pos) 279
 })
})

Expected Behaviour

When using the unsupported keyword, a clear error message such as "keyword is not supported" should be displayed instead of the AST output.

[odeke-em]

I've got this! I have started sending PRs fixing these and making the output more prespective. Please feel free to assign this to me.

[odeke-em]

I've mailed out to begin with #3752