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error[E0599]: no method named `exec` found for mutable reference `&mut Command` in the current scope
--> $DIR/issue-39175.rs:14:39
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LL | Command::new("echo").arg("hello").exec();
| ^^^^
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= help: items from traits can only be used if the trait is in scope
help: there is a method `pre_exec` with a similar name, but with different arguments
--> $SRC_DIR/std/src/os/unix/process.rs:LL:COL
help: trait `CommandExt` which provides `exec` is implemented but not in scope; perhaps you want to import it
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LL + use std::os::unix::process::CommandExt;
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0599`.
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