fix hang when substituting too many files at once

5 files changed, 229 insertions, 262 deletions

diff --git a/Cargo.lock b/Cargo.lock
index b862004..aafb4f8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -18,7 +18,7 @@ name = "aho-corasick"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -69,14 +69,15 @@ dependencies = [
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "atty"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -87,8 +88,13 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "backtrace"
-version = "0.3.40"
+version = "0.3.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -102,7 +108,7 @@ name = "backtrace-sys"
 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -115,6 +121,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "base64"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "bitflags"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -125,17 +136,17 @@ version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "blake2b_simd"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -150,7 +161,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.48"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -163,8 +174,8 @@ name = "chrono"
 version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -174,7 +185,7 @@ version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -183,21 +194,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "cloudabi"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "color_quant"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "constant_time_eq"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -224,19 +227,11 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.6.6"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -274,7 +269,7 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_users 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_users 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -298,7 +293,7 @@ name = "failure"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -307,9 +302,9 @@ name = "failure_derive"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -371,6 +366,16 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "getrandom"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "gif"
 version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -423,8 +428,8 @@ dependencies = [
  "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "muldiv 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "muldiv 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -564,7 +569,7 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -592,13 +597,13 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "lscolors 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mime 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "notify 4.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "osstrtools 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "notify 4.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "osstrtools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parse-ansi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "pathbuftools 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-ini 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal-notify 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -607,7 +612,7 @@ dependencies = [
  "strum 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "strum_macros 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "systemstat 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tree_magic 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "users 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -622,9 +627,9 @@ dependencies = [
  "gif 0.10.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "jpeg-decoder 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "lzw 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-iter 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "png 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "tiff 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -640,7 +645,7 @@ dependencies = [
 
 [[package]]
 name = "inotify"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -665,12 +670,20 @@ dependencies = [
 ]
 
 [[package]]
+name = "itertools"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "jpeg-decoder"
 version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -751,7 +764,7 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.2.1"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -764,7 +777,7 @@ dependencies = [
 
 [[package]]
 name = "mime"
-version = "0.3.14"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -772,7 +785,7 @@ name = "mime_guess"
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mime 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -818,7 +831,7 @@ dependencies = [
 
 [[package]]
 name = "muldiv"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -851,19 +864,18 @@ dependencies = [
 
 [[package]]
 name = "notify"
-version = "4.0.14"
+version = "4.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "filetime 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "inotify 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio-extras 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "walkdir 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -879,47 +891,47 @@ dependencies = [
 
 [[package]]
 name = "num-integer"
-version = "0.1.41"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-iter"
-version = "0.1.39"
+version = "0.1.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-rational"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.10"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.11.1"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hermit-abi 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -935,8 +947,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "osstrtools"
-version = "0.1.9"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "owning_ref"
@@ -972,7 +987,7 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1005,7 +1020,7 @@ dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "deflate 0.7.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "inflate 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-iter 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1018,7 +1033,7 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.6"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1037,7 +1052,7 @@ name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1066,38 +1081,25 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "rand_os"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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- "rayon-core 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "rust-argon2 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
@@ -1157,13 +1158,13 @@ dependencies = [
 
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@@ -1173,17 +1174,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
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 [[package]]
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 [[package]]
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@@ -1335,9 +1337,9 @@ name = "synstructure"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
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@@ -1519,7 +1526,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
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@@ -1602,12 +1610,13 @@ dependencies = [
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