PR: add libfuzzer-sys back, test_syntax-fuzz to ws

Cargo.lock

@@ -131,6 +131,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "arbitrary"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dde20b3d026af13f561bdd0f15edf01fc734f0dafcedbaf42bba506a9517f223"
+
 [[package]]
 name = "arrayref"
 version = "0.3.7"
@@ -388,6 +394,8 @@ version = "1.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57b6a275aa2903740dc87da01c62040406b8812552e97129a63ea8850a17c6e6"
 dependencies = [
+ "jobserver",
+ "libc",
  "shlex",
 ]
 
@@ -1374,6 +1382,15 @@ version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
 
+[[package]]
+name = "jobserver"
+version = "0.1.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48d1dbcbbeb6a7fec7e059840aa538bd62aaccf972c7346c4d9d2059312853d0"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "js-sys"
 version = "0.3.64"
@@ -1405,6 +1422,16 @@ version = "0.2.158"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d8adc4bb1803a324070e64a98ae98f38934d91957a99cfb3a43dcbc01bc56439"
 
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b9569d2f74e257076d8c6bfa73fb505b46b851e51ddaecc825944aa3bed17fa"
+dependencies = [
+ "arbitrary",
+ "cc",
+]
+
 [[package]]
 name = "libloading"
 version = "0.7.4"
@@ -3916,6 +3943,16 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "test_syntax-fuzz"
+version = "0.0.0"
+dependencies = [
+ "bumpalo",
+ "libfuzzer-sys",
+ "roc_parse",
+ "test_syntax",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.11.0"

Cargo.toml

@@ -31,6 +31,7 @@ members = [
     "crates/wasm_interp",
     "crates/language_server",
     "crates/roc_std_heap",
+    "crates/compiler/test_syntax/fuzz",
 ]
 
 exclude = [
@@ -125,6 +126,7 @@ insta = "1.28.0"
 js-sys = "0.3.61"
 lazy_static = "1.4.0"
 libc = "0.2.139" # update roc_std/Cargo.toml on change
+libfuzzer-sys = "0.4"
 libloading = "0.7.4"
 libtest-mimic = "0.6.0"
 log = "0.4.17"

crates/compiler/test_syntax/fuzz/Cargo.toml

@@ -13,12 +13,8 @@ cargo-fuzz = true
 test_syntax = { path = "../../test_syntax" }
 roc_parse = { path = "../../parse" }
 
-bumpalo = { version = "3.12.0", features = ["collections"] }
+bumpalo.workspace = true
-libfuzzer-sys = "0.4"
+libfuzzer-sys.workspace = true
-
-# Prevent this from interfering with workspaces
-[workspace]
-members = ["."]
 
 [[bin]]
 name = "fuzz_expr"