This repo is to reproduce a crash instantiating wasm32-unknown-unknown built wasm created with the debug configuration.
requires:
- rust-nightly
My rustc is:
rustc 1.24.0-nightly (73bca2b9f 2017-11-28)
It simply builds a main.rs with empty main. When built with --release, WebAssembly instantiation succeeds (as you can see in the console by the Instance being printed). When built with debug configuration, instantiation fails in the browser printing the following to the console:
bundle.js:10 Creating WASM module failed RuntimeError: memory access out of bounds
at _ZN8dlmalloc8dlmalloc8Dlmalloc6malloc17h4bbdde81e8f6d029E (wasm-function[388]:1523)
at _ZN91_$LT$$RF$$u27$a$u20$dlmalloc..global..GlobalDlmalloc$u20$as$u20$alloc..allocator..Alloc$GT$5alloc17h573839c1c2aedc42E (wasm-function[406]:79)
at __rdl_alloc (wasm-function[98]:90)
at __rust_alloc (wasm-function[549]:9)
at _ZN41_$LT$std..sync..mutex..Mutex$LT$T$GT$$GT$3new17h33cf35f583237304E (wasm-function[95]:82)
at _ZN3std6thread6Thread3new17h3709e8b66e12ce6eE (wasm-function[71]:1164)
at _ZN3std2rt10lang_start17h915e4ff7777401cdE (wasm-function[126]:247)
at main (wasm-function[1]:23)
at _start (wasm-function[555]:7)
at <anonymous>
reproduction:
make debug
open http://localhost:8000
Notice that release works
make release
open http://localhost:8000