fix: WebAssembly runtime error propagation (#6137)

Currently WebAssembly runtime errors don't propagate up to the user as
they use urls to denote where the error occurred which get caught by the source-map
pipeline which doesn't support the wasm scheme.

4 files changed, 61 insertions, 1 deletions

diff --git a/cli/disk_cache.rs b/cli/disk_cache.rs
index 58744acd8..965f8c096 100644
--- a/cli/disk_cache.rs
+++ b/cli/disk_cache.rs
@@ -50,7 +50,7 @@ impl DiskCache {
     out.push(scheme);
 
     match scheme {
-      "http" | "https" => {
+      "http" | "https" | "wasm" => {
         let host = url.host_str().unwrap();
         let host_port = match url.port() {
           // Windows doesn't support ":" in filenames, so we represent port using a
@@ -196,6 +196,7 @@ mod tests {
         "https://deno.land/std/http/file_server.ts",
         "https/deno.land/std/http/file_server.ts",
       ),
+      ("wasm://wasm/d1c677ea", "wasm/wasm/d1c677ea"),
     ];
 
     if cfg!(target_os = "windows") {
diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index 5ecd6d35b..9bdc1db60 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -1872,6 +1872,12 @@ itest!(wasm_async {
   output: "wasm_async.out",
 });
 
+itest!(wasm_unreachable {
+  args: "run wasm_unreachable.js",
+  output: "wasm_unreachable.out",
+  exit_code: 1,
+});
+
 itest!(top_level_await {
   args: "run --allow-read top_level_await.js",
   output: "top_level_await.out",
diff --git a/cli/tests/wasm_unreachable.js b/cli/tests/wasm_unreachable.js
new file mode 100644
index 000000000..991ebcec8
--- /dev/null
+++ b/cli/tests/wasm_unreachable.js
@@ -0,0 +1,50 @@
+// WebAssembly module containing a single function with an unreachable instruction
+const binary = Uint8Array.from([
+  0x00,
+  0x61,
+  0x73,
+  0x6d,
+  0x01,
+  0x00,
+  0x00,
+  0x00,
+  0x01,
+  0x04,
+  0x01,
+  0x60,
+  0x00,
+  0x00,
+  0x03,
+  0x02,
+  0x01,
+  0x00,
+  0x07,
+  0x0f,
+  0x01,
+  0x0b,
+  0x75,
+  0x6e,
+  0x72,
+  0x65,
+  0x61,
+  0x63,
+  0x68,
+  0x61,
+  0x62,
+  0x6c,
+  0x65,
+  0x00,
+  0x00,
+  0x0a,
+  0x05,
+  0x01,
+  0x03,
+  0x00,
+  0x00,
+  0x0b,
+]);
+
+const module = new WebAssembly.Module(binary);
+const instance = new WebAssembly.Instance(module);
+
+instance.exports.unreachable();
diff --git a/cli/tests/wasm_unreachable.out b/cli/tests/wasm_unreachable.out
new file mode 100644
index 000000000..64978bbb8
--- /dev/null
+++ b/cli/tests/wasm_unreachable.out
@@ -0,0 +1,3 @@
+error: Uncaught RuntimeError: unreachable
+    at unreachable (<anonymous>:0:40)
+    at [WILDCARD]/deno/cli/tests/wasm_unreachable.js:[WILDCARD]:18