Stream: git-wasmtime

Topic: wasmtime / issue #13363 Trying to run wasip2 example fails

Wasmtime GitHub notifications bot (May 14 2026 at 08:22):

ValorZard opened issue #13363:

Thanks for filing a bug report! Please fill out the TODOs below.

Note: if you want to report a security issue, please read our security policy!

Test Case

N/A

Steps to Reproduce

C:\github\wasmtime> cmake examples/
-- Building for: Visual Studio 16 2019
-- Selecting Windows SDK version 10.0.26100.0 to target Windows 10.0.26200.
-- The C compiler identification is MSVC 19.29.30159.0
-- The CXX compiler identification is MSVC 19.29.30159.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Enabling feature profiling
-- Enabling feature wat
-- Enabling feature cache
-- Enabling feature parallel-compilation
-- Enabling feature wasi
-- Enabling feature wasi-http
-- Enabling feature logging
-- Enabling feature coredump
-- Enabling feature addr2line
-- Enabling feature demangle
-- Enabling feature threads
-- Enabling feature gc
-- Enabling feature gc-drc
-- Enabling feature gc-null
-- Enabling feature async
-- Enabling feature cranelift
-- Enabling feature winch
-- Enabling feature debug-builtins
-- Enabling feature pooling-allocator
-- Enabling feature component-model
-- Enabling feature component-model-async
-- Enabling feature pulley
-- CMAKE_CXX_STANDARD is 17
-- ENABLE_CODE_ANALYSIS       OFF
-- Configuring done (10.4s)
-- Generating done (1.1s)
-- Build files have been written to: C:/github/wasmtime

C:\github\wasmtime>cargo run --example wasip2
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.71s
     Running `target\debug\examples\wasip2.exe`
Error: failed to read from `target/wasm32-wasip2/debug/wasi.wasm`
error: process didn't exit successfully: `target\debug\examples\wasip2.exe` (exit code: 1)

C:\github\wasmtime>

Expected Results

For it to work

Actual Results

It didn't work

Versions and Environment

Wasmtime version or commit: Current main (f6f69c7a0ef0e77a5f00555765e70ea104d56b56)

Operating system: Windows 11

Architecture: x86

Extra Info

Anything else you'd like to add?

the component example didn't work either

C:\github\wasmtime>cargo run --example component
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
     Running `target\debug\examples\component.exe`
Error: failed to read input file

Caused by:
    The system cannot find the path specified. (os error 3)

error: process didn't exit successfully: `target\debug\examples\component.exe` (exit code: 1)

C:\github\wasmtime>

Wasmtime GitHub notifications bot (May 14 2026 at 08:22):

ValorZard added the bug label to Issue #13363.

Wasmtime GitHub notifications bot (May 14 2026 at 14:47):

alexcrichton added the wasmtime:docs label to Issue #13363.

Wasmtime GitHub notifications bot (May 14 2026 at 14:47):

alexcrichton removed the bug label from Issue #13363.

Wasmtime GitHub notifications bot (May 14 2026 at 14:49):

alexcrichton commented on issue #13363:

Thanks for the report, these examples have auxiliary wasm files that are expected to be built before running. The documentation in the examples is out-of-date and doesn't mention this. You can build them (and everything else) by running the build inside of the cmake directory.

Wasmtime GitHub notifications bot (May 14 2026 at 18:43):

ValorZard commented on issue #13363:

@alexcrichton ill be honest and say i have no idea how to do that. calling cmake . inside of examples/ or in root didn't seem to do anything. Do I need something like emscripten?

Wasmtime GitHub notifications bot (May 27 2026 at 20:47):

alexcrichton closed issue #13363:

Thanks for filing a bug report! Please fill out the TODOs below.

Note: if you want to report a security issue, please read our security policy!

Test Case

N/A

Steps to Reproduce

C:\github\wasmtime> cmake examples/
-- Building for: Visual Studio 16 2019
-- Selecting Windows SDK version 10.0.26100.0 to target Windows 10.0.26200.
-- The C compiler identification is MSVC 19.29.30159.0
-- The CXX compiler identification is MSVC 19.29.30159.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Enabling feature profiling
-- Enabling feature wat
-- Enabling feature cache
-- Enabling feature parallel-compilation
-- Enabling feature wasi
-- Enabling feature wasi-http
-- Enabling feature logging
-- Enabling feature coredump
-- Enabling feature addr2line
-- Enabling feature demangle
-- Enabling feature threads
-- Enabling feature gc
-- Enabling feature gc-drc
-- Enabling feature gc-null
-- Enabling feature async
-- Enabling feature cranelift
-- Enabling feature winch
-- Enabling feature debug-builtins
-- Enabling feature pooling-allocator
-- Enabling feature component-model
-- Enabling feature component-model-async
-- Enabling feature pulley
-- CMAKE_CXX_STANDARD is 17
-- ENABLE_CODE_ANALYSIS       OFF
-- Configuring done (10.4s)
-- Generating done (1.1s)
-- Build files have been written to: C:/github/wasmtime

C:\github\wasmtime>cargo run --example wasip2
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.71s
     Running `target\debug\examples\wasip2.exe`
Error: failed to read from `target/wasm32-wasip2/debug/wasi.wasm`
error: process didn't exit successfully: `target\debug\examples\wasip2.exe` (exit code: 1)

C:\github\wasmtime>

Expected Results

For it to work

Actual Results

It didn't work

Versions and Environment

Wasmtime version or commit: Current main (f6f69c7a0ef0e77a5f00555765e70ea104d56b56)

Operating system: Windows 11

Architecture: x86

Extra Info

Anything else you'd like to add?

the component example didn't work either

C:\github\wasmtime>cargo run --example component
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
     Running `target\debug\examples\component.exe`
Error: failed to read input file

Caused by:
    The system cannot find the path specified. (os error 3)

error: process didn't exit successfully: `target\debug\examples\component.exe` (exit code: 1)

C:\github\wasmtime>

Last updated: Jun 01 2026 at 09:49 UTC