rustc panic in asan test

[Jaegoomon]

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_middle/src/ty/query/mod.rs:235:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.50.0-nightly (3d6705aa5 2020-12-07) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z sanitizer=address -C embed-bitcode=no -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `LLVMing`,
 right: `Codegenning`', /rustc/3d6705aa5abffe94c83bf09af8c3ba3c599845fc/compiler/rustc_codegen_ssa/src/back/write.rs:1425:21

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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.50.0-nightly (3d6705aa5 2020-12-07) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z sanitizer=address -C embed-bitcode=no -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `cs492-concur-homework`

Is there anyone why those errors occurs?

I have not revised any code except for project .rs file.

But only in asan sanitizer test, those error occurs. Do I have to reinstall rustc or programs related to asan?

I have no idea, please help me....

[blue-int]

Getting the same error occasionally. I think the reason is that nightly is updated recently.

[travis1829]

I also had the same errors often. In my case, it worked again after running cargo clean.

[Jaegoomon]

Oh really? Thanks for comments, then I'll try again few hours later.....

[blue-int]

cargo clean fails of removing homework/target/rls/debug/deps/.nfs~~ file.

[travis1829]

That also happened to me, but it seems like you can ignore it.
Honestly, I also don't know the precise problem nor solution, but in my case after running
cargo clean, and then running
cargo update, cargo build, and then cargo_asan ...,
it worked.

[blue-int]

The reason was that I didn't properly exit the test execution and build files could not be removed.
I terminated the process manually by htop and did cargo clean again.

[blue-int]

The error happens continuously even if I correctly terminate the test.

[tomtomjhj]

Wow that's interesting. For now, lets use older nightly

rustup toolchain install nightly-2020-09-23-x86_64-unknown-linux-gnu

diff --git a/scripts/grade-utils.sh b/scripts/grade-utils.sh
index 5c6b6b7..aea163a 100755
--- a/scripts/grade-utils.sh
+++ b/scripts/grade-utils.sh
@@ -7,7 +7,7 @@
 # * RUNNERS: array of "cargo[_asan | _tsan] [--release]"
 # * TIMEOUT: default 10s
 
-rustup toolchain update stable nightly
+# rustup toolchain update stable nightly
 
 echo_err() {
     echo -e "\033[0;31m\033[1m$@\033[0m" 1>&2
@@ -31,7 +31,7 @@ cargo_asan() {
     local SUBCOMMAND=$1; shift
     RUSTFLAGS="-Z sanitizer=address" \
         RUSTDOCFLAGS="-Z sanitizer=address" \
-        cargo +nightly $SUBCOMMAND --target x86_64-unknown-linux-gnu $@
+        cargo +nightly-2020-09-23 $SUBCOMMAND --target x86_64-unknown-linux-gnu $@
 }
 export -f cargo_asan
 
@@ -41,7 +41,7 @@ cargo_tsan() {
         TSAN_OPTIONS="suppressions=suppress_tsan.txt" \
         RUSTDOCFLAGS="-Z sanitizer=thread" \
         RUST_TEST_THREADS=1 \
-        cargo +nightly $SUBCOMMAND --target x86_64-unknown-linux-gnu $@
+        cargo +nightly-2020-09-23 $SUBCOMMAND --target x86_64-unknown-linux-gnu $@
 }
 export -f cargo_tsan

[blue-int]

s20140600@kaist-cp-cs492:~/cs492-concur/homework$ RUSTFLAGS="-Z sanitizer=address" RUSTDOCFLAGS="-Z sanitizer=address" cargo +nightly-2020-09-23 test --target x86_64-unknown-linux-gnu --test split_ordered_list smoke -- --nocapture
error: toolchain 'nightly-2020-09-23-x86_64-unknown-linux-gnu' is not installed

[tomtomjhj]

rustup toolchain install nightly-2020-09-23-x86_64-unknown-linux-gnu

[jeehoonkang]

Thank you for the report. Did anyone report it via https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md ?

[Jaegoomon]

No, I didn't..

[travis1829]

Me neither.

[ghost]

I'm having the same problem, even after fetching upstream and after running the line
'rustup toolchain install nightly-2020-09-23-x86_64-unknown-linux-gnu'

Is there anything more I must do to solve this problem?

[tomtomjhj]

@bryanswkim99 have you applied this diff #269 (comment) ?

[ghost]

It seems to be working now. Thank you!

[jeehoonkang]

• I'd like to keep it open until the issue is reported to the rust repository.
• If you're inclined to do so, please do it and give me your student id.

[yujingaya]

Seems like the Issue is already reported and it was related to incremental compilation. Hence the cargo clean worked.

The fix has been merged yesterday. So it'll be fine after nightly 2020-12-09 I guess?