Comments (3)
Ah I see, it only ICEs on older editions. If you're using a new cargo project to bisect, it will be set to edition=2021 by cargo new
.
With that, an ICE bisects to nightly-2022-08-10
: broken MIR in DefId(0:9 ~ issue_124189[40d2]::main) (NoSolution): could not prove Binder(WellFormed(<&dyn std::marker::Copy as Trait>::Type), [])
.
Yeah it looks related to #103899, and both are in very close pieces of code -- although the repro there seems older, so maybe not an exact duplicate per se, but seemingly share some common WF-related cause. That one ICEs in liveness (one of the steps in MIR typeck, <rustc_borrowck::type_check::liveness::trace::LivenessContext>::compute_drop_data
) while this one in MIR typeck directly (<rustc_borrowck::type_check::TypeChecker>::fully_perform_op::<(), rustc_middle::ty::ParamEnvAnd<rustc_middle::traits::query::type_op::ProvePredicate>>
).
from rust.
The ICE indeed appeared at rustc
command (at nightly-2024-04-20 as reported),
but I cannot reproduce it with cargo-bisect-rustc.
❯ cargo bisect-rustc --version
cargo-bisect-rustc-bisect-rustc 0.6.8
2024-01-01 ~ 2024-04-20 Log
❯ cargo bisect-rustc --start=2024-01-01 --end=2024-04-20 --preserve --regress=ice
checking the start range to find a passing nightly
installing nightly-2024-01-01
testing...
RESULT: nightly-2024-01-01, ===> No
checking the end range to verify it does not pass
installing nightly-2024-04-20
testing...
RESULT: nightly-2024-04-20, ===> No
uninstalling nightly-2024-04-20
ERROR: the end of the range (nightly-2024-04-20) does not reproduce the regression
Stack backtrace:
0: __mh_execute_header
1: __mh_execute_header
2: __mh_execute_header
3: __mh_execute_header
4: __mh_execute_header
5: __mh_execute_header
2024-01-01 ~ 2024-04-19 Log
❯ cargo bisect-rustc --start=2024-01-01 --end=2024-04-19 --preserve --regress=ice
checking the start range to find a passing nightly
installing nightly-2024-01-01
testing...
RESULT: nightly-2024-01-01, ===> No
checking the end range to verify it does not pass
installing nightly-2024-04-19
testing...
RESULT: nightly-2024-04-19, ===> No
ERROR: the end of the range (nightly-2024-04-19) does not reproduce the regression
Stack backtrace:
0: __mh_execute_header
1: __mh_execute_header
2: __mh_execute_header
3: __mh_execute_header
4: __mh_execute_header
5: __mh_execute_header
from rust.
This is probably a duplicate of #103899
from rust.
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from rust.