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misc/wasm: check type of argument to Go.run

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This results in a nicer error message if the argument to Go.run is
omitted or of the wrong type.

Fixes #37000

Change-Id: I7f36d007f41a79b2cea1cebf5cce127786341202
Reviewed-on: https://go-review.googlesource.com/c/go/+/266117
Trust: Richard Musiol <neelance@gmail.com>
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Richard Musiol 2020-10-29 00:07:04 +01:00 committed by Richard Musiol
parent f2ee58b6bb
commit 7be8358f70
1 changed files with 3 additions and 0 deletions
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3
misc/wasm/wasm_exec.js
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@ -503,6 +503,9 @@
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
throw new Error("Go.run: WebAssembly.Instance expected");
}
this._inst = instance;
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id