Empty folder in migrations directory throws: "Cannot read property 'files'....

[cgewecke]

Issue

Cross-reporting from solidity-coverage 432. This was fixed for the test directory in #2419 but seems to affect migrations as well.

Without an empty folder staged for quick access in an emergency, it wont be possible to put something in a folder when the need arises (without first creating a folder).

Steps to Reproduce

truffle unbox metacoin
mkdir migrations/emptyfolder
truffle test

Actual Results

Compiling your contracts...
===========================
> Compiling ./contracts/ConvertLib.sol
> Compiling ./contracts/MetaCoin.sol
> Compiling ./contracts/Migrations.sol
> Compiling ./test/TestMetaCoin.sol

Error: TypeError: Cannot read property 'files' of undefined
    at Object.run (/Users/cgewecke/code/sc-forks/migra-bug/node_modules/truffle/build/webpack:/packages/migrate/index.js:92:1)
Truffle v5.1.0 (core: 5.1.0)
Node v10.15.3

Environment

• Operating System: OSX
• Ethereum client: ganache
• Truffle version (truffle version): 5.1.0
• node version (node --version): 10.15.3
• npm version (npm --version):

[eggplantzzz]

Thanks @cgewecke, looks like it's time for another quick patch :)

[gnidan]

I believe this is released in v5.1.1! Closing. Let us know if the problem persists.