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.