Prevent crashes from get_main_hub when in trap context#2510

solnic merged 2 commits intomastergetsentry/sentry-ruby:masterfrom

2495-threaderror-resqueno_fork-resquework-new-level-error-unhandled-cant-be-called-from-trap-context-threaderrorgetsentry/sentry-ruby:2495-threaderror-resqueno_fork-resquework-new-level-error-unhandled-cant-be-called-from-trap-context-threaderrorCopy head branch name to clipboard