error: rustup is not installed at '/home/n/.cargo'

[lilith]

I haven't touched this box for a few weeks. I came back, and (forgetting I already installed rustup), tried

curl https://sh.rustup.rs -sSf | sh

This produces

n@nathanael-xeon:~/Documents$ curl https://sh.rustup.rs -sSf | sh
info: downloading installer
Segmentation fault (core dumped)
rustup: command failed: /tmp/tmp.UWJtLBWTNB/rustup-init

I check my system versions and info:

n@nathanael-xeon:~/Documents$ rustc -V
rustc 1.11.0 (9b21dcd6a 2016-08-15)
n@nathanael-xeon:~/Documents$ cargo -V
cargo 0.12.0-nightly (6b98d1f 2016-07-04)
n@nathanael-xeon:~/Documents$ rustup -V
rustup 0.1.12 (c6e430a 2016-05-12)
n@nathanael-xeon:~/Documents$ uname -a
Linux nathanael-xeon 3.19.0-66-generic #74~14.04.1-Ubuntu SMP Tue Jul 19 19:56:11 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Let me try using my existing rustup installation

n@nathanael-xeon:~/Documents$ rustup self update
error: rustup is not installed at '/home/n/.cargo'
n@nathanael-xeon:~/Documents$ rustup self uninstall
error: rustup is not installed at '/home/n/.cargo'
n@nathanael-xeon:~/Documents$ rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: downloading component 'rustc'
 43.3 MiB /  43.3 MiB (100 %)   2.8 MiB/s ETA:   0 s                
info: downloading component 'rust-std'
 55.8 MiB /  55.8 MiB (100 %)   2.9 MiB/s ETA:   0 s                
info: downloading component 'rust-docs'
  7.2 MiB /   7.2 MiB (100 %)   2.7 MiB/s ETA:   0 s                
info: downloading component 'cargo'
  4.1 MiB /   4.1 MiB (100 %)   2.6 MiB/s ETA:   0 s                
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'rust-docs'
info: installing component 'cargo'
error: rustup is not installed at '/home/n/.cargo'

Hmm. Before I attempt to wipe everything away, is there any detail I should preserve (if this is worth fixing)?

I did note that 'multirust' is not present:

n@nathanael-xeon:~/Documents$ ls -R ~/.cargo/bin
cargo  racer  rustc  rustdoc  rust-gdb  rust-lldb  rustup

At one time, I used multirust, but I rid myself of it and got a working rustup installation (or, at one time, so I believed. Rust 1.8 is working, so...)

EDIT: It looks like ~/.multirust was still hanging around. Renaming the folder did nothing. It's ~89MB compressed, if it would help.

Deleting the folder did something.

Before deletion:

n@nathanael-xeon:~/Documents$ which rustc
/home/n/.cargo/bin/rustc
n@nathanael-xeon:~/Documents$ rustc -V
rustc 1.11.0 (9b21dcd6a 2016-08-15)

After:

n@nathanael-xeon:~/Documents$ rustc -V
error: no default toolchain configured

And it would appear that ~/.multirust/version keeps getting recreated with the contents 12.

/usr/local/lib/rustlib/uninstall.sh doesn't exist, so I'm not sure how to complete the exorcism.

[lilith]

I tried renaming ~/.cargo, but rustup still segfaults.

[lilith]

Running valgrind produces some interesting uninitialized writes (strange valgrind worked, given jemalloc supposedly dropped support for it)!

n@nathanael-xeon:~/Documents$ valgrind --track-origins=yes /tmp/tmp.5q7Y0SpOko/rustup-init 
==12220== Memcheck, a memory error detector
==12220== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==12220== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==12220== Command: /tmp/tmp.5q7Y0SpOko/rustup-init
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x5656BD: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E6FB4: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x56552F: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x5656BD: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D48CA: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x56552F: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x5656BD: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D4908: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x56552F: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x5656BD: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D496E: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x56552F: std::path::Path::exists::h7a4153731a96a583 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x1DA43A: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x1DA3CA: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x1DA449: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x1DA3CA: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x584064: sdallocx (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1DA457: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x1DA3CA: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x58455B: sdallocx (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1DA457: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x1DA3CA: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Conditional jump or move depends on uninitialised value(s)
==12220==    at 0x584576: sdallocx (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1DA457: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Uninitialised value was created by a stack allocation
==12220==    at 0x1DA3CA: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220== 
==12220== Invalid read of size 8
==12220==    at 0x59D417: je_huge_dalloc (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1DA457: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)
==12220==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==12220== 
==12220== 
==12220== Process terminating with default action of signal 11 (SIGSEGV)
==12220==  Access not within mapped region at address 0x0
==12220==    at 0x59D417: je_huge_dalloc (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1DA457: rustup_init::self_update::do_anti_sudo_check::home_mismatch::heb4fde5439976c13 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1D58B0: rustup_init::self_update::install::h5c8318effea204c9 (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x1E80EC: rustup_init::main::he9ea588d309e0baa (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x57B606: __rust_maybe_catch_panic (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x572292: std::rt::lang_start::h352a66f5026f54bd (in /tmp/tmp.5q7Y0SpOko/rustup-init)
==12220==    by 0x56AAF44: (below main) (libc-start.c:287)

[lilith]

Likely the problem is in here.

https://github.com/rust-lang-nursery/rustup.rs/blob/f20d52558a1562d3e185d5b154885e7dc08fb86f/src/rustup-cli/self_update.rs#L292-L325

It would appear that everything is OK if ~/.multirust/version has a trailing lf, but if the file is only two bytes, BOOM.

This should let you reproduce it:

n@nathanael-xeon:~/Documents$ mkdir ~/.multirust || printf "12" > ~/.multirust/version && ls -lah ~/.multirust/version
mkdir: cannot create directory ‘/home/n/.multirust’: File exists
-rw-rw-r-- 1 n n 2 Aug 25 21:07 /home/n/.multirust/version

[brson]

@nathanaeljones Thanks for the investigation.

I can reproduce the segfault with your instructions. And I've verified that rustup 0.6.0 does not crash, the link for which is https://static.rust-lang.org/rustup/archive/0.6.0/x86_64-unknown-linux-gnu/rustup-init.

[brson]

related to arm7 crash #687

[brson]

Slight tweak for the repro

$ mkdir ~/.multirust; printf "12" > ~/.multirust/version && ls -lah ~/.multirust/version
$ curl -O https://static.rust-lang.org/rustup/archive/0.6.1/x86_64-unknown-linux-gnu/rustup-init
$ chmod u+x rustup-init
$ ./rustup-init
Segmentation fault (core dumped)

[brson]

Should be fixed.

[Bulletninja]

Trying to run https://github.com/public-awesome/terra-spacecamp from gitpod

But when it gets to the last line of Dockerfile https://github.com/public-awesome/terra-spacecamp/blob/main/.gitpod.Dockerfile :

#RUN rustup update stable \
#   && rustup target add wasm32-unknown-unknown

and i get:

error: rustup is not installed at '/workspace/.cargo'

$ rustup show
Default host: x86_64-unknown-linux-gnu
rustup home:  /home/gitpod/.rustup

installed toolchains
--------------------

stable-x86_64-unknown-linux-gnu
1.55.0-x86_64-unknown-linux-gnu (default)

active toolchain
----------------

1.55.0-x86_64-unknown-linux-gnu (default)
rustc 1.55.0 (c8dfcfe04 2021-09-06)

[kinnison]

@Bulletninja That sounds like a Docker related problem. If you continue to have issues then please open a fresh issue, don't respond to ancient issues.