native tsc exited with {} without parseable diagnostics{}

Error message

native tsc exited with {} without parseable diagnostics{}

What it means

Error "native tsc exited with {} without parseable diagnostics{}" thrown in denoland/deno.

Source

Thrown at cli/tools/check.rs:395

    log::error!("{}\n", diagnostics);
    return Err(deno_core::anyhow::anyhow!("Type checking failed."));
  }

  // tsc exited non-zero but we have nothing to show. If it printed diagnostic
  // lines we deliberately dropped (e.g. `noImplicitOverride` in remote modules),
  // its exit code is expected - treat the check as clean. Only when tsc produced
  // no recognizable diagnostics at all is this a genuine failure (an internal
  // error or a malformed generated config); surface whatever it printed then.
  let tsc_reported_diagnostics =
    crate::tsc::native::output_has_diagnostics(&stdout);
  if !output.status.success() && !tsc_reported_diagnostics {
    let detail = stdout.trim();
    let detail = if detail.is_empty() {
      stderr.trim()
    } else {
      detail
    };
    return Err(deno_core::anyhow::anyhow!(
      "native tsc exited with {} without parseable diagnostics{}",
      output.status,
      if detail.is_empty() {
        String::new()
      } else {
        format!(":\n{detail}")
      }
    ));
  }

  // Type-checked clean: record the hash so an unchanged re-check skips tsc.
  if let Some(check_hash) = maybe_check_hash {
    type_check_cache.add_check_hash(check_hash);
  }

  Ok(())
}

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at cli/tools/check.rs:395 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/f97dc2c4036a3abc. Report an issue: GitHub.