Package: rustc
Version: 1.14.0+dfsg1-3
Severity: normal

Dear Maintainer,

just trying to run the commands below (with or without RUST_BACKTRACE) causes
rustc to panic. The removal of the directory was originally not intentional,
so a crash for such harmless command was a bit of surprise.

$ mkdir dir
$ cd dir
$ rm -rf ../dir
$ RUST_BACKTRACE=1 rustc -C target-cpu=help
error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: 
https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: run with `RUST_BACKTRACE=1` for a backtrace

thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: Error 
{ repr: Os { code: 2, message: "No such file or directory" } }', 
src/libcore/result.rs:837
stack backtrace:
   1:     0x7f7d23970dda - <unknown>
   2:     0x7f7d2398305f - <unknown>
   3:     0x7f7d2397f8a5 - <unknown>
   4:     0x7f7d2397ffc7 - 
std::panicking::rust_panic_with_hook::h109e116a3a861224
   5:     0x7f7d2397fe54 - <unknown>
   6:     0x7f7d2397fd79 - std::panicking::begin_panic_fmt::h26713cea9bce3ab0
   7:     0x7f7d2397fd07 - rust_begin_unwind
   8:     0x7f7d239cb41d - core::panicking::panic_fmt::hcfbb59eeb7f27f75
   9:     0x7f7d20be63d3 - <unknown>
  10:     0x7f7d20d6ebcc - rustc::session::build_session_::h7a3559f2373a5d05
  11:     0x7f7d20d6dd7e - 
rustc::session::build_session_with_codemap::h68bc7bcd2f34eee4
  12:     0x7f7d20d6d72c - rustc::session::build_session::h437fda3c327a8bde
  13:     0x7f7d23d26030 - <rustc_driver::RustcDefaultCalls as 
rustc_driver::CompilerCalls<'a>>::no_input::h8047df7741757d1c
  14:     0x7f7d23d21d27 - rustc_driver::run_compiler::hafe7bbfedf95a825
  15:     0x7f7d23c57378 - <unknown>
  16:     0x7f7d2398ae0a - __rust_maybe_catch_panic
  17:     0x7f7d23c76fa8 - <unknown>
  18:     0x7f7d2397eb74 - <unknown>
  19:     0x7f7d1ed4f493 - start_thread
  20:     0x7f7d23645afe - __clone
  21:                0x0 - <unknown>

Sadly, the backtrace is not improved by install the debug symbols.

-- System Information:
Debian Release: 9.1
  APT prefers stable-debug
  APT policy: (500, 'stable-debug'), (500, 'proposed-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.12.4 (SMP w/8 CPU cores; PREEMPT)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US:en 
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages rustc depends on:
ii  binutils              2.28-5
ii  gcc                   4:6.3.0-4
ii  libc6                 2.24-11+deb9u1
ii  libc6-dev [libc-dev]  2.24-11+deb9u1
ii  libjs-jquery          3.1.1-2
ii  libstd-rust-dev       1.14.0+dfsg1-3

Versions of packages rustc recommends:
ii  rust-gdb   1.14.0+dfsg1-3
ii  rust-lldb  1.14.0+dfsg1-3

Versions of packages rustc suggests:
ii  rust-doc  1.14.0+dfsg1-3

-- no debconf information

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