Make any Composer Command Segfault

This is from the shock your co-worker department: There is an easy one-liner to make any composer based project spit “Segmentation fault (core dumped)” regardless of the Composer command entered:

composer config -- vendor-dir '{$bin-dir}'

Smuggle this endless-loop creating Composer config setting into a shy looking commit (update some dependencies and just add this little setting along the way) and push it. When this tainted composer.json is checked-out, each time composer loads the config part (which happens automatically) and resolves the vendor-dir setting it will get stuck in an endless loop and then quit with a segmentation fault.

And there is little which creates more question-marks above a PHP developers head when using a command in shell and then seeing a segmentation fault when you just do not need it.

To lift this prank to the next level, offer your help to look into the issue. Create a new shell session and quickly export the environment variable and clear the terminal again:

export COMPOSER_VENDOR_DIR=vendor; clear

In your shell session composer will just behave as if there is no problem. Afterwards close your session. Next time your co-worker will probably start to feel too dumb to use composer again and puzzles about weird system behaviour resulting in unspecified segmentation faults.

This entry was posted in Bugs and Features, PHP Development, Pressed, Tools and tagged , , . Bookmark the permalink.

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