On Sun, May 12, 2024 at 03:55:21AM +0200, Quốc Trị Đỗ wrote: > I found a bug when i tried with syntax <(cmd). this is an example > cat <(wc -l) < bk
What is "wc -l" supposed to read from? It counts lines of standard input, until EOF is reached. But its standard input is a terminal. And you're running it as a background process. I would *expect* this command to fail with an error message of some kind, because a background process shouldn't be allowed to read input from a terminal. > How to fix it? It doesn't last that long. After a while, it will show "wc: > stdin: read: Input/output error". Or we can ctrl C. Sounds appropriate. What's the "bug in bash" supposed to be? What did you think this command would do?
