If a user program installs custom signal handling for SIGINT,
the DartDev instance may exit before its child, potentially causing
confusing behavior and 'zombie' children. By ignoring these signals in
DartDev, the DartDev instance will only exit once its child process
exits.
Fixes https://github.com/dart-lang/sdk/issues/42092
Change-Id: I04bf6d1f375b8bb3a4f7022f2c79ddde3bd5f414
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149643
Commit-Queue: Ben Konyi <bkonyi@google.com>
Reviewed-by: Jaime Wren <jwren@google.com>
Ben Konyi