Broken package.json causes pnpm to exit without any message.

[hyrious]

pnpm version: 6.14.3

Code to reproduce the issue:

mkdir test && cd test
touch package.json       # note that empty file is invalid json
pnpm i                   # just exit with no output

echo "{}" > package.json # make it valid
pnpm i
Already up-to-date 	     # correct output

Expected behavior:

It should at least print out "invalid json" message.

Actual behavior:

Exit with no output. But the error code is 1.

Additional information:

• node -v prints: v16.6.2
• Windows, macOS, or Linux?: MacOS 11.5.2