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Don't require the element index in "uninitialized element" trap strings.#1076

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rossberg merged 1 commit intoWebAssembly:masterfrom
sunfishcode:no-index
Sep 26, 2019
Merged

Don't require the element index in "uninitialized element" trap strings.#1076
rossberg merged 1 commit intoWebAssembly:masterfrom
sunfishcode:no-index

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One test in elem.wast expects the trap message "uninitialized element 7",
which requires wasm runtimes to be able to print the element index. This
is obviously nice for humans, but can be inconvenient to implement in wasm
implementations which use signals to implement traps, as it requires special
code to preserve the element index.

Other tests eg. in imports.wast don't include the number in the expected
message.

It seems better to allow implementations to decide for themselves
whether to print the index number, rather than having it be an outright
requirement of the spec test.

One test in elem.wast expects the trap message "uninitialized element 7",
which requires wasm runtimes to be able to print the element index. This
is obviously nice for humans, but can be inconvenient to implement in wasm
implementations which use signals to implement traps, as it requires special
code to preserve the element index.

Other tests eg. in imports.wast don't include the number in the expected
message.

It seems better to allow implementations to decide for themselves
whether to print the index number, rather than having it be an outright
requirement of the spec test.
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Totally agreed.

@rossberg rossberg merged commit 92c117d into WebAssembly:master Sep 26, 2019
@sunfishcode sunfishcode deleted the no-index branch September 26, 2019 02:57
sunfishcode added a commit to sunfishcode/wasmtime that referenced this pull request Sep 26, 2019
sunfishcode added a commit to bytecodealliance/wasmtime that referenced this pull request Sep 26, 2019
sunfishcode added a commit to sunfishcode/spec that referenced this pull request Oct 7, 2019
Similar to WebAssembly#1076, don't include index numbers in expected error messages
from validation. This allows implementations to avoid creating
dynamically formatted strings for validation error messages. Admittedly
this isn't a huge burden, but it does seem like something that shouldn't
be required to pass the spec test.
sunfishcode added a commit that referenced this pull request Oct 20, 2019
Similar to #1076, don't include index numbers in expected error messages
from validation. This allows implementations to avoid creating
dynamically formatted strings for validation error messages. Admittedly
this isn't a huge burden, but it does seem like something that shouldn't
be required to pass the spec test.
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2 participants