cat CMakeLists.txt | grep hangs

[certik]

~/repos/lfortran/integration_tests(main)$ cat CMakeLists.txt | grep
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
[hangs]

I don't have grep installed.

[wolfv]

Weird, on macOS it directly quits the cat when the command does not exist.

[certik]

So usually it works:

~/repos/foo(main)$ cat README.md | foooasd
foooasd: command not found
~/repos/foo(main)$ cat README.md | grep
grep: command not found

But not on the particular file in LFortran:

~/repos/lfortran/integration_tests(main)$ cat CMakeLists.txt | grep
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C
Received Ctrl+C

The above is on another Windows computer. So this bug is definitely real.

[wolfv]

And only hangs on Windows, yeah?

[certik]

It hangs on Linux too (in WSL):

~/repos/lfortran/lfortran/integration_tests(main)$ cat CMakeLists.txt | grep
^CReceived Ctrl+C
^CReceived Ctrl+C

In there grep is available. In Bash on Linux I get:

ondrej@laptop:~/.../lfortran/integration_tests(main)$ cat CMakeLists.txt | grep
Usage: grep [OPTION]... PATTERNS [FILE]...
Try 'grep --help' for more information.