Define a fuzz target for the parser

cranelift/isle/Cargo.lock

@@ -35,6 +35,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "arbitrary"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "577b08a4acd7b99869f863c50011b01eb73424ccc798ecd996f2e24817adfca7"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -148,6 +154,14 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "isle-fuzz"
+version = "0.0.0"
+dependencies = [
+ "isle",
+ "libfuzzer-sys",
+]
+
 [[package]]
 name = "islec"
 version = "0.1.0"
@@ -171,6 +185,17 @@ version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3cb00336871be5ed2c8ed44b60ae9959dc5b9f08539422ed43f09e34ecaeba21"
 
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36a9a84a6e8b55dfefb04235e55edb2b9a2a18488fcae777a6bdaa6f06f1deb3"
+dependencies = [
+ "arbitrary",
+ "cc",
+ "once_cell",
+]
+
 [[package]]
 name = "log"
 version = "0.4.14"