cannot use state because it was mutably borrowed

[ArniDagur]

When attempting to build bfc with Rust Nightly, I got this error:

error[E0503]: cannot use `state` because it was mutably borrowed
    --> /home/arni/.cargo/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
     |
955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
     |                       ---------------------------------------- borrow of `state` occurs here
...
959  |         state = match (state, whitespace, limit) {
     |                        ----- borrow occurs due to use of `state` in closure
...
1008 |     while cont && match state { B | C => true, A => false } {
     |                                 ^ use of borrowed `state`
1009 |         machine(&mut cont, (fake_i, ' '));
     |         ------- borrow later used here

error: aborting due to previous error

For more information about this error, try `rustc --explain E0503`.
error: could not compile `getopts`.

It went away when the dependencies were updated:

diff --git a/Cargo.lock b/Cargo.lock
index b4d0624..4e4dec8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,183 +1,215 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
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+version = "0.7.6"
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- "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "aho-corasick"
-version = "0.6.10"
+name = "ansi_term"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
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- "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "llvm-sys 80.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quickcheck 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
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 [[package]]
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+
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+
+[[package]]
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- "regex 0.1.73 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
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- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
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- "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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+name = "rand_hc"
+version = "0.2.0"
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+dependencies = [
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+name = "redox_syscall"
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+name = "regex"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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-version = "0.1.20"
+name = "regex-syntax"
+version = "0.6.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "remove_dir_all"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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 name = "semver"
@@ -194,31 +226,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
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-version = "2.1.4"
+version = "3.1.0"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
index 24b1772..a50c26e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,11 +9,11 @@ readme = "README.md"
 license = "GPL-2.0"
 
 [dependencies]
-llvm-sys = "80"
-itertools = "0.4"
-rand = "0.3"
-quickcheck = "0.3"
-tempfile = "2.1"
-getopts = "0.2"
-matches = "0.1"
-ansi_term = "0.9"
+llvm-sys = "80.1.1"
+itertools = "0.8.0"
+rand = "0.7.2"
+quickcheck = "0.9.0"
+tempfile = "3.1.0"
+getopts = "0.2.21"
+matches = "0.1.8"
+ansi_term = "0.12.1"