Odd issues with target/debug/ dir at compile time (in no-panic)

[kentfredric]

I've stumbled upon an odd bug I can't really explain and putting it here down for later triage.

Currently I can't enable tests for no-panic as when run, they fail as follows:

    Running `/var/tmp/portage/dev-rust/no-panic-0.1.11/work/debug/deps/no_panic-c7147136cd4e7936`

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

     Running `/var/tmp/portage/dev-rust/no-panic-0.1.11/work/debug/deps/test-33985f05d64a442c`

running 11 tests
    Finished dev [unoptimized + debuginfo] target(s) in 0.07s
error: extern location for no_panic does not exist: target/debug/libno_panic.so
error: extern location for no_panic does not exist: target/debug/libno_panic.so
error: extern location for no_panic does not exist: target/debug/libno_panic.so



error: extern location for no_panic does not exist: target/debug/libno_panic.so
error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpqi2IW3/test_lifetime_elision.rs:1:5
  |
1 | use no_panic :: no_panic ;struct Buffer { bytes : [ u8 ; 24 ] , } # [ no_panic ] fn demo (
  |     ^^^^^^^^ can't find crate

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpKf03vA/test_borrow_from_mut_self.rs:1:5
  |
1 | use no_panic :: no_panic ;struct S { data : usize , } impl S {
  |     ^^^^^^^^ can't find crate


error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmp0Qcgxb/test_method_in_impl.rs:1:5
  |
1 | use no_panic :: no_panic ;struct S ; impl S {
  |     ^^^^^^^^ can't find crate

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmphlilEe/test_readme.rs:1:5
  |
1 | use no_panic :: no_panic ;# [ no_panic ] fn demo ( s : & str ) -> & str { & s [ 1 .. ] } fn main (  ) {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors
error: aborting due to 2 previous errors
error: aborting due to 2 previous errors

error: aborting due to 2 previous errors



For more information about this error, try `rustc --explain E0463`.
For more information about this error, try `rustc --explain E0463`.
For more information about this error, try `rustc --explain E0463`.For more information about this error, try `rustc --explain E0463`.

test no_panic::test_borrow_from_mut_self ... FAILED
test no_panic::test_method_in_impl ... FAILED
test no_panic::test_lifetime_elision ... FAILED
test link_error::test_readme ... FAILED
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpFLwCWo/test_mut_argument.rs:1:5
  |
1 | use no_panic :: no_panic ;# [ no_panic ] fn demo ( mut i : i32 ) -> i32 { i += 1 ; i } fn main (  ) {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmp3Dulm8/test_readme.rs:1:5
  |
1 | use no_panic :: no_panic ;# [ no_panic ] fn demo ( s : & str ) -> & str { & s [ 1 .. ] } fn main (  ) {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpqSMcwM/test_ref_argument.rs:1:5
  |
1 | use no_panic :: no_panic ;# [ no_panic ] fn demo ( ref i : i32 ) -> i32 { * i } fn main (  ) {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
error: extern location for no_panic does not exist: target/debug/libno_panic.so

test no_panic::test_mut_argument ... FAILED
error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmprIPXVN/test_receiver_lifetime_elision.rs:1:5
  |
1 | use no_panic :: no_panic ;struct Buffer { bytes : [ u8 ; 24 ] , } impl Buffer {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
test no_panic::test_readme ... FAILED
test no_panic::test_ref_argument ... FAILED
test no_panic::test_receiver_lifetime_elision ... FAILED
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpoF36Hc/test_self_in_vec.rs:1:5
  |
1 | use no_panic :: no_panic ;struct S { data : usize , } impl S {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
test no_panic::test_self_in_vec ... FAILED
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpgcoUa6/test_self_in_macro_containing_fn.rs:1:5
  |
1 | use no_panic :: no_panic ;pub struct S { data : usize , } macro_rules ! emit {
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
error: extern location for no_panic does not exist: target/debug/libno_panic.so

error[E0463]: can't find crate for `no_panic`
 --> /var/tmp/portage/dev-rust/no-panic-0.1.11/temp/.tmpHmaOSl/test_ref_mut_argument.rs:1:5
  |
1 | use no_panic :: no_panic ;# [ no_panic ] fn demo ( ref mut i : i32 ) -> i32 { * i += 1 ; * i } fn main (
  |     ^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
test no_panic::test_self_in_macro_containing_fn ... FAILED
test no_panic::test_ref_mut_argument ... FAILED

failures:

---- no_panic::test_borrow_from_mut_self stdout ----
thread 'no_panic::test_borrow_from_mut_self' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_method_in_impl stdout ----
thread 'no_panic::test_method_in_impl' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

---- no_panic::test_lifetime_elision stdout ----
thread 'no_panic::test_lifetime_elision' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- link_error::test_readme stdout ----
thread 'link_error::test_readme' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_mut_argument stdout ----
thread 'no_panic::test_mut_argument' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_readme stdout ----
thread 'no_panic::test_readme' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_ref_argument stdout ----
thread 'no_panic::test_ref_argument' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_receiver_lifetime_elision stdout ----
thread 'no_panic::test_receiver_lifetime_elision' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_self_in_vec stdout ----
thread 'no_panic::test_self_in_vec' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_self_in_macro_containing_fn stdout ----
thread 'no_panic::test_self_in_macro_containing_fn' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5

---- no_panic::test_ref_mut_argument stdout ----
thread 'no_panic::test_ref_mut_argument' panicked at 'assertion failed: status.success()', tests/compiletest/mod.rs:40:5


failures:
    link_error::test_readme
    no_panic::test_borrow_from_mut_self
    no_panic::test_lifetime_elision
    no_panic::test_method_in_impl
    no_panic::test_mut_argument
    no_panic::test_readme
    no_panic::test_receiver_lifetime_elision
    no_panic::test_ref_argument
    no_panic::test_ref_mut_argument
    no_panic::test_self_in_macro_containing_fn
    no_panic::test_self_in_vec

test result: FAILED. 0 passed; 11 failed; 0 ignored; 0 measured; 0 filtered out

error: test failed, to rerun pass '--test test'

The file definitely exists:

/var/tmp/portage/dev-rust/no-panic-0.1.11/work # ls -lah debug/
total 28M
drwxr-xr-x  8 portage portage 4.0K Oct  3 21:41 .
drwx------  6 portage portage 4.0K Oct  3 21:41 ..
drwxr-xr-x 10 portage portage 4.0K Oct  3 21:39 build
-rw-r--r--  1 portage portage    0 Oct  3 21:39 .cargo-lock
drwxr-xr-x  2 portage portage  12K Oct  3 21:41 deps
drwxr-xr-x  2 portage portage 4.0K Oct  3 21:39 examples
drwxr-xr-x 27 portage portage 4.0K Oct  3 21:39 .fingerprint
drwxr-xr-x  5 portage portage 4.0K Oct  3 21:41 incremental
-rw-r--r--  1 portage portage  143 Oct  3 21:41 libno_panic.d
-rwxrwxr-x  2 portage portage  26M Oct  3 21:41 libno_panic.so
drwxr-xr-x  2 portage portage 4.0K Oct  3 21:39 native
-rwxrwxr-x  2 portage portage  24K Oct  3 21:41 no_panic-c7147136cd4e7936
-rw-r--r--  1 portage portage  154 Oct  3 21:41 no_panic-c7147136cd4e7936.d
-rwxrwxr-x  2 portage portage 2.1M Oct  3 21:41 test-33985f05d64a442c
-rw-r--r--  1 portage portage  315 Oct  3 21:41 test-33985f05d64a442c.d

Its possibly some bad hard-coded logic in no-panic though.

[kentfredric]

Hmm, does look like some bad code in a test.

// no-panic-0.1.11/tests/compiletest/mod.rs
   let status = Command::new("rustc")
        .arg("--crate-name")
        .arg(name)
        .arg(rs)
        .arg("--edition=2018")
        .arg("-C")
        .arg("opt-level=3")
        .arg("--emit=asm")
        .arg("--out-dir")
        .arg(tempdir.path())
        .arg("--extern")
        .arg("no_panic=target/debug/libno_panic.so")
        .status()
        .expect("failed to execute rustc");