This requires a native context which might not be available when
collecting source positions, and errors are cleared in any case.

BUG=chromium:992063

Change-Id: Ie0b81f60debaaf9a7810a42f56de0c005a7fbe18
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745338
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63175}