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-rwxr-xr-xscripts/fuzz_opt.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/scripts/fuzz_opt.py b/scripts/fuzz_opt.py
index 25d06c148..03334ffa7 100755
--- a/scripts/fuzz_opt.py
+++ b/scripts/fuzz_opt.py
@@ -181,6 +181,15 @@ def randomize_fuzz_settings():
FUZZ_OPTS += ['--legalize-js-interface']
else:
LEGALIZE = False
+
+ # if GC is enabled then run --dce at the very end, to ensure that our
+ # binaries validate in other VMs, due to how non-nullable local validation
+ # and unreachable code interact. see
+ # https://github.com/WebAssembly/binaryen/pull/5665
+ # https://github.com/WebAssembly/binaryen/issues/5599
+ if '--disable-gc' not in FEATURE_OPTS:
+ FUZZ_OPTS += ['--dce']
+
print('randomized settings (NaNs, OOB, legalize):', NANS, OOB, LEGALIZE)