yarn.lock changes after removing node_modules

[targos]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

After installing two dependencies with yarn add. Removing node_modules and running yarn again changes yarn.lock.

If the current behavior is a bug, please provide the steps to reproduce.

Shown in the following test repo: https://github.com/targos/yarn-bug-mime-db

1. Create a new project with a fresh package.json: https://github.com/targos/yarn-bug-mime-db/tree/e58faae8f0ab3b8b3c21e65a3467933b1e54e523
2. Run yarn add koa@^1.2.0 koa-compress@^1.0.9: https://github.com/targos/yarn-bug-mime-db/tree/b3f36fb85a120fbf5a313c1b4ce11bdb42d251b5
3. Run rm -rf node_modules && yarn: https://github.com/targos/yarn-bug-mime-db/tree/cfaad20259f70a4c5b734f2a327a6b7f7ec75505

diff between step 2 and 3:

 yarn.lock | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/yarn.lock b/yarn.lock
index 540394d..ca5a414 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -160,11 +160,7 @@ [email protected]:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
 
-"mime-db@>= 1.27.0 < 2":
-  version "1.28.0"
-  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.28.0.tgz#fedd349be06d2865b7fc57d837c6de4f17d7ac3c"
-
-mime-db@~1.27.0:
+"mime-db@>= 1.27.0 < 2", mime-db@~1.27.0:
   version "1.27.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.27.0.tgz#820f572296bbd20ec25ed55e5b5de869e5436eb1"
 

What is the expected behavior?

yarn.lock should not change. I do not know if the correct state is the one after step 2 or after step 3.

Please mention your node.js, yarn and operating system version.

• Node.js 8.0.0
• yarn 0.24.5
• Linux 4.11.3-200.fc25.x86_64

[arcanis]

Thanks for the report! I'm going to close it in favor of #3490, which I think is the reason you're experiencing this issue.