How can I tell if I'm printing to stdout or stderr?

Challenges
1

I’m stuck on Stage #EA6 - It seems to me like I’m outputting the right things, but I guess it must be going to stdout somehow. I’ve tried using a logger instead, I’ve tried changing between fmt.Fprintf and println, I’m not sure why my output isn’t being seen by the tester.

Here are my logs:

remote: [tester::#EA6] Running tests for Stage #EA6 (Scanning: Lexical errors)
remote: [tester::#EA6] [test-1] Running test case: 1
remote: [tester::#EA6] [test-1] Writing contents to ./test.lox:
remote: [tester::#EA6] [test-1] [test.lox] @
remote: [tester::#EA6] [test-1] $ ./your_program.sh tokenize test.lox
remote: [your_program] Logs from your program will appear here!
remote: [your_program] EOF  null
remote: [your_program] [Line 1] Error: Unexpected character: @
remote: [tester::#EA6] [test-1] ? [line 1] Error: Unexpected character: @
remote: [tester::#EA6] [test-1] Skipped 2 lines that didn't start with [line N]
remote: [tester::#EA6] [test-1] Expected line #1 on stderr to be "[line 1] Error: Unexpected character: @", but didn't find line
remote: [tester::#EA6] [test-1] Test failed

And here’s a snippet of my code:

convertedContents := (string)(fileContents)
	cleanRun := true

	if len(convertedContents) > 0 {
		for index, char := range convertedContents {
			if scanned, validFile := tokens[char]; validFile {
				fmt.Println(scanned)
			} else {
				line := strings.Count(convertedContents[0:index], "\n") + 1
				fmt.Fprintf(os.Stderr, "[Line %d] Error: Unexpected character: %c", line, char)
				cleanRun = false
			}

		}
		fmt.Println("EOF  null")
2

I think your snippet is correctly printing to stderr.

I’d check your output and remember that computers tend to take things Lliterally.

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3

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