(DO NOT MERGE) Trying to figure out why this is unhappy in CI

src/tools/compiletest/src/runtest.rs

@@ -31,7 +31,7 @@ use std::io::{self, BufReader};
 use std::iter;
 use std::path::{Path, PathBuf};
 use std::process::{Child, Command, ExitStatus, Output, Stdio};
-use std::str::{self, FromStr};
+use std::str;
 use std::sync::Arc;
 
 use anyhow::Context;
@@ -3941,14 +3941,7 @@ impl<'test> TestCx<'test> {
             }
 
             if self.props.check_run_stdout_is_json_lines {
-                for (line, n) in proc_res.stdout.lines().zip(1..) {
-                    if serde_json::Value::from_str(line).is_err() {
-                        self.fatal_proc_rec(
-                            &format!("invalid JSON on line {n} of stdout: {line:?}"),
-                            &proc_res,
-                        );
-                    }
-                }
+                self.fatal_proc_rec("@@ pretending that run-stdout is not json @@", &proc_res);
             }
 
             if !self.props.error_patterns.is_empty() || !self.props.regex_error_patterns.is_empty()