fix futures creating aliasing mutable and shared ref #56319
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bors added S-waiting-on-bors This was referenced Nov 28, 2018
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Nov 29, 2018
fix futures creating aliasing mutable and shared ref Fixes the problem described in rust-lang/miri#532 (comment): `set_task_waker` takes a shared reference and puts a copy into the TLS (in a `NonNull`), but `get_task_waker` gets it back out as a mutable reference. That violates "mutable references must not alias anything"!
bors added a commit that referenced this pull request Nov 29, 2018
Rollup of 22 pull requests Successful merges: - #55391 (bootstrap: clean up a few clippy findings) - #56021 (avoid features_untracked) - #56023 (atomic::Ordering: Get rid of misleading parts of intro) - #56080 (Reduce the amount of bold text at doc.rlo) - #56114 (Enclose type in backticks for "non-exhaustive patterns" error) - #56124 (Fix small doc mistake on std::io::read::read_to_end) - #56127 (Update an outdated comment in mir building) - #56148 (Add rustc-guide as a submodule) - #56149 (Make std::os::unix/linux::fs::MetadataExt::a/m/ctime* documentation clearer) - #56220 (Suggest appropriate place for lifetime when declared after type arguments) - #56223 (Make JSON output from -Zprofile-json valid) - #56236 (Remove unsafe `unsafe` inner function.) - #56255 (Update outdated code comments in StringReader) - #56257 (rustc-guide has moved to rust-lang/) - #56273 (Add missing doc link) - #56289 (Fix small typo in comment of thread::stack_size) - #56294 (Fix a typo in the documentation of std::ffi) - #56312 (Deduplicate literal -> constant lowering) - #56319 (fix futures creating aliasing mutable and shared ref) - #56321 (rustdoc: add bottom margin spacing to nested lists) - #56322 (resolve: Fix false-positives from lint `absolute_paths_not_starting_with_crate`) - #56330 (Clean up span in non-trailing `..` suggestion) Failed merges: r? @ghost
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Fixes the problem described in rust-lang/miri#532 (comment):
set_task_wakertakes a shared reference and puts a copy into the TLS (in aNonNull), butget_task_wakergets it back out as a mutable reference. That violates "mutable references must not alias anything"!