Description

When http.get() receives a malformed URL string (no scheme, whitespace in host, etc.), it compiles and runs without returning an error. The Error value is always nil even for obviously invalid URLs because parse_url() accepted any string — it didn't require a scheme prefix.

Repro

import @http

do main() {
    mut resp, err = http.get("not a valid url")
    if err != nil {
        println("got error as expected")
    } otherwise {
        println("no error — this is the bug")
    }
}

Expected: err is non-nil with a descriptive message.

Actual: err is nil. The invalid URL is silently accepted.

Root cause

parse_url() in ez_http.c did not require an http:// or https:// scheme. It treated the entire input as a hostname, which then either failed silently or produced garbage results.

Fix

• Require http:// or https:// scheme in parse_url()
• Reject empty hosts and hosts containing whitespace
• Improved error message: "invalid URL: missing scheme (expected http:// or https://)"
• Removed invalid fail test E14001_http_invalid_url.ez (E14001 was never emitted by the compiler)