fix corner case in `collapse_vars` (#3521)
authorAlex Lam S.L <alexlamsl@gmail.com>
Wed, 23 Oct 2019 17:13:57 +0000 (01:13 +0800)
committerGitHub <noreply@github.com>
Wed, 23 Oct 2019 17:13:57 +0000 (01:13 +0800)
commit0f7aa41e339b574ee0f67c093438d356a8a85477
tree21ae6f719c7310c46e8e0edf2f099481a76aa756
parent370c8e03855f17d73e8a0f75ae0b9b40e31e47e9
fix corner case in `collapse_vars` (#3521)

fixes #3520
lib/compress.js
test/compress/collapse_vars.js
test/compress/drop-unused.js