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+Title: This Week in Rust 6
+Date: 2013-07-13 16:07
+Category: This Week in Rust
+
+Hello and welcome to the sixth issue of *This Week in Rust*, a weekly overview
+of Rust and its community.
+
+<!-- more -->
+
+# What's cooking on master?
+
+Issue churn this week was -17! A total of 63 PRs were merged this week, twice
+as many as last week. Not bad!
+
+## Breaking changes
+
+- The [task local storage (TLS)
+  API](https://github.com/mozilla/rust/pull/7677) was cleaned up (there's
+  still [one PR](https://github.com/mozilla/rust/pull/7751) in the queue that
+  finishes it up).
+- [DList was modernized](https://github.com/mozilla/rust/pull/7652).
+- [`extra::json` now uses `Iterator<char>` rather than a
+  `@Reader`](https://github.com/mozilla/rust/pull/7704)
+- [Various free-standing functions in f32 etc were
+  removed](https://github.com/mozilla/rust/pull/7117)
+- [ref bindings in irrefutable patterns has been tightened
+  up](https://github.com/mozilla/rust/pull/7262). This potentially fixes *and
+  breaks* code. It's breaking because the compiler now rejects incorrect
+  programs that it did not before.
+- [str no longer encodes invalid
+  utf-8](https://github.com/mozilla/rust/pull/7612).
+- [`extra::rope` was removed](https://github.com/mozilla/rust/pull/7629)
+- [`extra::net_ip` and so on were
+  removed](https://github.com/mozilla/rust/pull/7594). They were redundant
+  names for `extra::net::ip` and such
+- [`Iterator::size_hint`'s lower bound is no longer an
+  Option](https://github.com/mozilla/rust/pull/7570)
+
+## Notable compiler additions, bugfixes, and cleanup
+
+- [Unnecessary basic blocks were
+  removed](https://github.com/mozilla/rust/pull/7763). This makes for much
+  easier to read unoptimized IR.
+- [Use of `*int`/`*uint` is now properly
+  warned](https://github.com/mozilla/rust/pull/7734) in FFI functions.
+- [More default method fixes](https://github.com/mozilla/rust/pull/7725).
+- A [needless copy](https://github.com/mozilla/rust/pull/7717) was removed
+  from immediate values (I'm pretty sure LLVM optimized it away when
+  optimizations were on, not positive).
+- A [lint for overqualified names](https://github.com/mozilla/rust/pull/7706)
+  was added.
+- [SIMD arithmetic](https://github.com/mozilla/rust/pull/7705) was
+  implemented.
+- A [graph abstraction and CFG](https://github.com/mozilla/rust/pull/7688) was
+  introduced, to unify how the various pieces of the compiler use graphs.
+- [The maximum lifetime of stack
+  closures](https://github.com/mozilla/rust/pull/7455) is now constrained. Not
+  quite sure what that means, but it fixes a segfault.
+- [repr doesn't infinite loop](https://github.com/mozilla/rust/pull/7683) on
+  zero-sized structs (ie, unit structs).
+- [Type parameter pretty printing](https://github.com/mozilla/rust/pull/7698)
+  was fixed, it now prints the type name rather than `'a` and `'b` and
+  soforth.
+- [`mut` in default method arguments is now
+  allowed](https://github.com/mozilla/rust/pull/7631).
+- [IR for calls with immediate return
+  values](https://github.com/mozilla/rust/pull/7645) was improved.
+- [Exchange allocation headers (ie, the headers on `~T`) were
+  removed](https://github.com/mozilla/rust/pull/7605). This was a heroic
+  effort by strcat and Luqman.
+- [`-Z trans-stats` now reports perf-function
+  statistics](https://github.com/mozilla/rust/pull/7456)
+- [Scopes were decoupled from LLVM basic
+  blocks](https://github.com/mozilla/rust/pull/7636), improving unoptimized
+  builds, and allowing more things in optimized builds to be inlined.
+- [An infinite loop when recursively including
+  modules](https://github.com/mozilla/rust/pull/7585) was fixed.
+- An [ICE involving struct-like enum
+  variants](https://github.com/mozilla/rust/pull/7557) was fixed.
+- The buildsystem [cleans up old
+  libraries](https://github.com/mozilla/rust/pull/7637) when it needs to.
+- [A bunch of managed boxes](https://github.com/mozilla/rust/pull/7615) were
+  removed from the AST.
+
+## Notable library additions, bugfixes, and cleanup
+
+- [`print!` and `println!` macros](https://github.com/mozilla/rust/pull/7775)
+  were added (though [#7779](https://github.com/mozilla/rust/issues/7779)
+  renames them).
+- [Ord now uses default methods](https://github.com/mozilla/rust/pull/7765),
+  allowing you to get default implementations for everything but `lt`.
+- [`extra::Bitv` now takes `&[bool]` rather than
+  `~[uint]`](https://github.com/mozilla/rust/pull/7730).
+- [x64 now uses large stacks (4 MiB) by
+  default](https://github.com/mozilla/rust/pull/7728).
+- [`is_utf8` is now 22% faster](https://github.com/mozilla/rust/pull/7696)
+- [Metrics reporting and
+  ratcheting](https://github.com/mozilla/rust/pull/7623) was added to the test
+  harness.
+- A [DoubleEndedIterator](https://github.com/mozilla/rust/pull/7707) was
+  added.
+- A [`mut_split` method was added](https://github.com/mozilla/rust/pull/7691)
+  to partition a `&mut [T]` into two pieces.
+- We [now have pointer arithmetic](https://github.com/mozilla/rust/pull/7631).
+- A [month's work of runtime work](https://github.com/mozilla/rust/pull/7265)
+  landed.
+- [A safe, cross-platform `mmap`
+  wrapper](https://github.com/mozilla/rust/pull/7528) was added.
+- [SmallIntMap and SmallIntSet have external
+  iterators](https://github.com/mozilla/rust/pull/7614).
+- [JSON parsing got 93% faster](https://github.com/mozilla/rust/pull/7608)
+- [Deque](https://github.com/mozilla/rust/pull/7562) got a good cleanup and
+  speedup.
+- [vec now implements `pop_opt` and `shift_opt`
+  methods](https://github.com/mozilla/rust/pull/7602).
+- A [`peek_` adaptor](https://github.com/mozilla/rust/pull/7604) was added,
+  which calls a closure on ever item before returning it. Mostly useful for
+  debugging your iterators.
+
+## Documentation etc
+
+- [vim](https://github.com/mozilla/rust/pull/7742)
+  [improvements](https://github.com/mozilla/rust/pull/7665) landed.
+- [`po4a` support for translation](https://github.com/mozilla/rust/pull/7641)
+  was added.
+- [`libc::c_void` is better
+  documented](https://github.com/mozilla/rust/pull/7690).
+- [Man pages](https://github.com/mozilla/rust/pull/7632) for all the tools are
+  now included.
+- The [iterator tutorial](https://github.com/mozilla/rust/pull/7736) was
+  extended.
+
+# Meetings
+
+The [Tuesday
+meeting](https://github.com/mozilla/rust/wiki/Meeting-weekly-2013-07-09) was
+all about split stacks and FFI. It's complex and above my ability to
+summarize, but from what I can tell no real consensus was made. But, it's the
+best enumeration of all the various issues surrounding split stacks that I've
+seen.
+
+# Discussion + Blog posts
+
+From now on I'm going to just link to the reddit thread if there is one, as it
+often has additional comments or insights.
+
+- [A simple, self-contained example of using a shared
+  library](https://gist.github.com/jmptable/5980297)
+- [Experimental Actor
+  Library (reddit)](http://www.reddit.com/r/rust/comments/1i3c15/experimental_actor_library_in_rust/)
+- [Herb Sutter describes Rust
+  (reddit)](http://www.reddit.com/r/rust/comments/1i30sw/herb_sutter_describes_rust_c_questions_and/)
+- [Philosophy and "for" loops
+  (reddit)](http://www.reddit.com/r/rust/comments/1i2y9e/philosophy_and_for_loops_more_from_go_and_rust/)
+- [Reddit thread about the weekly
+  meeting](http://www.reddit.com/r/rust/comments/1hy6l9/meetingweekly20130709_split_stacks_ffi/)
+- [BZIP2 bindings
+  (reddit)](http://www.reddit.com/r/rust/comments/1hxp2s/little_bzip2_binding_library_as_well_as_a_bigger/)
+- [Proposal for an additional use case of the "in" keyword besides for loops
+  (reddit)](http://www.reddit.com/r/rust/comments/1hsqf5/proposal_for_an_additional_use_case_of_the_in/)
+- [Technical Q&A on Servo
+  (reddit)](http://www.reddit.com/r/rust/comments/1i6ykh/technical_qa_on_servo/)