Typestate 5 - #343
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Lots of work on typestate_check, seems to get a lot of the way through checking the standard library. * Added for, for_each, assign_op, bind, cast, put, check, break, and cont. (I'm not sure break and cont are actually handled correctly.) * Fixed side-effect bug in seq_preconds so that unioning the preconditions of a sequence of statements or expressions is handled correctly. * Pass poststate correctly through a stmt_decl. * Handle expr_ret and expr_fail properly (after execution of a ret or fail, everything is true -- this is needed to handle ifs and alts where one branch is a ret or fail) * Fixed bug in set_prestate_ann where a thing that needed to be mutated wasn't getting passed as an alias * Fixed bug in how expr_alt was treated (zero is not the identity for intersect, who knew, right?) * Update logging to reflect log_err vs. log * Fixed find_locals so as to return all local decls and exclude function arguments. * Make union_postconds work on an empty vector (needed to handle empty blocks correctly) * Added _vec.cat_options, which takes a list of option[T] to a list of T, ignoring any Nones * Added two test cases.
Added support for self_method, cont, chan, port, recv, send, be, do_while, spawn, and ext; handled break and cont correctly. (However, there are no non-xfailed test cases for ext or spawn in stage0 currently.) Although the standard library compiles and all test cases pass with typestate enabled, I left typestate checking disabled as rustc terminates abnormally when building the standard library if so, even though it does generate code correctly.
(needed for typestate_check). Also changed a (log; fail) to (log_err; fail) in typestate_check, and added some more logging funs in util.common.
…ted with postcond for scrutinee)
The code for taking pattern-bound variables was being interspersed with pattern code, so that if a nested pattern failed partway through, a variable would be taken but never dropped (because the drop code is inside the block representing the action for the pattern). For example, in the pattern foo(?i, bar(some[t](_)), _), if the scrutinee was foo(x, bar(none[t]), y), the variable i would be taken but never dropped. The patch fixes this bug.
I changed the error message to also suggest checking the -L flag when this happens.
In rustc, nested patterns were potentially matching when they shouldn't match, because a loop index wasn't being incremented. Fixed it and added one test case.
I changed instantiate to print out a more helpful error message, which required passing it a session argument. To avoid threading extra arguments through a lot of functions, I added a session field to ty_ctxt.
Enable typestate checking (just for uninitialized vars) and un-XFAIL the relevant tests for stage0.
This was supposed to be in a previous commit. I don't know what happened.
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343: Bump arrayvec from 0.4.9 to 0.4.10 r=matklad a=dependabot[bot] Bumps [arrayvec](https://github.com/bluss/arrayvec) from 0.4.9 to 0.4.10. <details> <summary>Commits</summary> - [`21661fa`](bluss/arrayvec@21661fa) 0.4.10 - [`06930d2`](bluss/arrayvec@06930d2) FIX: Remove unused Copy/Clone for MaybeUninit - [`85d9a06`](bluss/arrayvec@85d9a06) FIX: Use repr(C) MaybeUninit after discussion with RalfJung - See full diff in [compare view](bluss/arrayvec@0.4.9...0.4.10) </details> <br /> [](https://dependabot.com/compatibility-score.html?dependency-name=arrayvec&package-manager=cargo&previous-version=0.4.9&new-version=0.4.10) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- **Note:** This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit. You can always request more updates by clicking `Bump now` in your [Dependabot dashboard](https://app.dependabot.com). <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot ignore this [patch|minor|major] version` will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language - `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com): - Update frequency (including time of day and day of week) - Automerge options (never/patch/minor, and dev/runtime dependencies) - Pull request limits (per update run and/or open at any time) - Out-of-range updates (receive only lockfile updates, if desired) - Security updates (receive only security updates, if desired) Finally, you can contact us by mentioning @dependabot. </details> 344: Bump itertools from 0.7.11 to 0.8.0 r=matklad a=dependabot[bot] Bumps [itertools](https://github.com/bluss/rust-itertools) from 0.7.11 to 0.8.0. <details> <summary>Commits</summary> - [`cd0602a`](rust-itertools/itertools@cd0602a) 0.8.0 - [`5a8f2fd`](rust-itertools/itertools@5a8f2fd) MAINT: Require Rust 1.24 as minimum version - [`4986d92`](rust-itertools/itertools@4986d92) DOC: Minor edits to module docs - [`01f15a0`](rust-itertools/itertools@01f15a0) Merge [rust-lang#288](https://github-redirect.dependabot.com/bluss/rust-itertools/issues/288) - [`883d40a`](rust-itertools/itertools@883d40a) map_into method - [`3bf265d`](rust-itertools/itertools@3bf265d) Merge pull request [rust-lang#321](https://github-redirect.dependabot.com/bluss/rust-itertools/issues/321) from JohnHeitmann/master - [`e820996`](rust-itertools/itertools@e820996) Document the trait extension behavior of Itertools a bit more clearly - [`44c9654`](rust-itertools/itertools@44c9654) Merge pull request [rust-lang#318](https://github-redirect.dependabot.com/bluss/rust-itertools/issues/318) from bluss/std-deprecations - [`d2e254f`](rust-itertools/itertools@d2e254f) API: Fix the mystery deprecation message for Step - [`602f2f6`](rust-itertools/itertools@602f2f6) API: Deprecate .foreach() in favour of std's .for_each() - Additional commits viewable in [compare view](rust-itertools/itertools@0.7.11...0.8.0) </details> <br /> [](https://dependabot.com/compatibility-score.html?dependency-name=itertools&package-manager=cargo&previous-version=0.7.11&new-version=0.8.0) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- **Note:** This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit. You can always request more updates by clicking `Bump now` in your [Dependabot dashboard](https://app.dependabot.com). <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot ignore this [patch|minor|major] version` will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language - `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com): - Update frequency (including time of day and day of week) - Automerge options (never/patch/minor, and dev/runtime dependencies) - Pull request limits (per update run and/or open at any time) - Out-of-range updates (receive only lockfile updates, if desired) - Security updates (receive only security updates, if desired) Finally, you can contact us by mentioning @dependabot. </details> Co-authored-by: dependabot[bot] <support@dependabot.com>
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git didn't love me much today -- I think everything ended up looking right in the end, but I had to do a lot of rebasing.