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Add specific help for *how* to fix an incremental lock error.

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This commit is contained in:
Eric Huss 2021-05-28 16:40:22 -07:00
parent 834ec68821
commit e7411a26e4
1 changed files with 13 additions and 0 deletions
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13
compiler/rustc_incremental/src/persist/fs.rs
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@ -521,6 +521,19 @@ fn lock_directory(
or disable incremental compilation",
session_dir.display()
));
if std::env::var_os("CARGO").is_some() {
err.help(
"incremental compilation can be disabled by setting the \
environment variable CARGO_INCREMENTAL=0 (see \
https://doc.rust-lang.org/cargo/reference/profiles.html#incremental)",
);
err.help(
"the entire build directory can be changed to a different \
filesystem by setting the environment variable CARGO_TARGET_DIR \
to a different path (see \
https://doc.rust-lang.org/cargo/reference/config.html#buildtarget-dir)",
);
}
}
err.emit();
Err(ErrorReported)