Andreas, looks like your correctness check works:
(result_interpreted) is not equal to (result_compiled), nice!

This is a smaller test case:
+// Flags: --expose-wasm
+
+load("test/mjsunit/wasm/wasm-constants.js");
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+(function() {
+var builder = new WasmModuleBuilder();
+var original_size = 16;
+builder.addMemory(original_size, 1000, false);
+builder.addFunction("foo", kSig_i_v)
+  .addBody([
+      kExprMemorySize,
+      kExprI32Const, 34,
+      kExprGrowMemory,
+      kExprI32DivU
+            ])
+            .exportFunc();
+var module = builder.instantiate();
+assertEquals(original_size, module.exports.foo());
+})();

We have to wait with a fix until the 0xc patch lands (https://codereview.chromium.org/2345593003)

ClusterFuzz has detected this issue as fixed in range 420327:420425.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5147683918708736

Fuzzer: afl_v8_wasm_code_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  (result_interpreted)==(result_compiled) in wasm-code.cc
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=418554:418622
Fixed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=420327:420425

Minimized Testcase (0.02 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97XQZSmhKKuOoG70miXSSOEnRUhT-J7ZKSMCJmEUIycmWY5Mob3Jk9Nn1SIsOHtVwG6iyQFGwe4e_jbwokXYBwM2hPlDTebH23tz7z1DSBFt7kpSaG8H9vdUEfRfPgAUJdycnQSRtkXMV32TczBQwLHNhzxZQ?testcase_id=5147683918708736

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase is verified as fixed, closing issue.

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