print all errors from scanner.ErrorList when calling gno.ParseFile

[thehowl]

h/t @gfanton

package parser // import "go/parser"

func ParseFile(fset *token.FileSet, filename string, src any, mode Mode) (f *ast.File, err error)
    [...]

    If the source couldn't be read, the returned AST is nil and the error
    indicates the specific failure. If the source was read but syntax errors
    were found, the result is a partial AST (with ast.Bad* nodes representing
    the fragments of erroneous source code). Multiple errors are returned via a
    scanner.ErrorList which is sorted by source position.

Currently, errors from a scanner.ErrorList are printed directly, and so only the first error is shown:

$ gno run a.gno
panic: a.gno:5:5: expected ';', found example (and 1 more errors)

// a.gno example
package main

func main() {
	for {
		_ example
}

We should handle the cases where we have a scanner.ErrorList and print all errors available in the list

[Villaquiranm]

I would Like to work on this 👀

[Kouteki]

Closed by #2011