Stream: git-cranelift

Topic: cranelift / Issue #1243 Wasm br_table spec running forever

GitHub (Feb 28 2020 at 23:27):

alexcrichton transferred Issue #1243:

The br_table.wast spec appears to run forever when the jump_tables_enabled flag is set to false. This may be a regression in recent versions like 0.49.0 as this was not observed in 0.44.0.

• What are the steps to reproduce the issue?
  I used wasmtime at commit a2479df32932b2481ae576a9b07a55081288b20c to run the spectests.

  1. Add flag_builder.set("jump_tables_enabled", "false").unwrap(); to wast_testsuites.rs in wasmtime.
  2. Run cargo test br_table in wasmtime.
  3. The test appears to run forever.

• What do you expect to happen?
  The spectest should run to completion.

• What does actually happen?
  The spectest appears to run forever.

• Which Cranelift version / commit hash / branch are you using?
  0.50.0

• If relevant, can you include some extra information about your environment?
  (Rust version, operating system, architecture...)
  rustc 1.39.0 (4560ea788 2019-11-04)
  macOS Catalina

Last updated: Dec 06 2025 at 05:03 UTC