Ganache fork bug: extcodesize

Reproduce:

$ npm install
$ ./node_modules/.bin/ganache-cli -p 9545 &
$ ./node_modules/.bin/ganache-cli -f 'http://localhost:9545'

In different terminal:

$ ./node_modules/.bin/truffle test
$ ./node_modules/.bin/truffle test --network ganache

Expected result

Both tests pass

Actual result

The first test passes, but the second run against the forked ganache instance fails