Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
Fixes “TypeError: sourceContent.split is not a function” at blueslip_stacktrace.ts:60 when there’s another error during page load. Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
The stack trace popup is now sourcemapped and each stackframe have a expandable code context window. [anders@zulipchat.com: Rebased and simplified.]