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Crash when compiling an exported declare function with a default parameter value #3046
Description
Bug description
Hi, I found that asc crashes while compiling the following code snippet. I would expect this to report a normal compilation error rather than crashing.
Steps to reproduce
// bad.ts
export declare function f(x:i32=0):i32> node ~/fuzz_emerging_compilers/AssemblyScript/assemblyscript/bin/asc --optimizeLevel 2 --shrinkLevel 2 bad.ts -o bad.wasm
▌ Whoops, the AssemblyScript compiler has crashed during compile :-(
▌
▌ Here is the stack trace hinting at the problem, perhaps it's useful?
▌
▌ RangeError: Invalid array length
▌ at t.getNonParameterLocalTypes (.../assemblyscript/src/program.ts:3903:17)
▌ at t.ensureVarargsStub (.../assemblyscript/src/compiler.ts:6692:24)
▌ at t.compileModuleExport (.../assemblyscript/src/compiler.ts:984:37)
▌ at t.compileModuleExport (.../assemblyscript/src/compiler.ts:972:18)
▌ at t.compileModuleExports (.../assemblyscript/src/compiler.ts:951:14)
▌ at t.compile (.../assemblyscript/src/compiler.ts:570:14)Other findings
- Removing either
exportordeclaredoes not trigger the crash. - Removing the default parameter value does not trigger the crash:
// successfully compiled
export declare function f(x:i32):i32
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