src: don't print garbage errors #4112
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mscdex
added
the
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LGTM. |
| if (message.length() == 0) | ||
| PrintErrorString("\n"); | ||
| else | ||
| PrintErrorString("%s\n", *message); |
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You could simplify this to PrintErrorString("%s\n", *message ? *message : "");
I would print a message like "<toString() threw exception>" instead of a blank line.
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I would print a message like
"<toString() threw exception>"instead of a blank line.
I thought about that, but the current check is insufficient, since empty string is a valid toString() response. Would you be OK with me using a TryCatch to actually detect if an error was thrown?
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I mean when *message == nullptr, that means .toString() failed somehow.
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That doesn't seem to be the case though.
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@bnoordhuis is *message == nullptr for you? If so, it might be platform specific based on #4079 (comment).
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Ah, I missed that it's using node::Utf8Value (which indeed never returns a nullptr because it returns a pointer to its embedded char array.)
If you use String::Utf8Value, you should see *message == nullptr after a .toString() exception.
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LGTM once @bnoordhuis is happy with it |
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LGTM |
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LGTM |
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Would you mind if I land this PR? 😄 |
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@JungMinu Don't land it yet, as the test fails on Windows. I'd also like @bnoordhuis's input. |
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@cjihrig Sorry to bug you, It slipped my mind. 😢 |
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IMHO, I think that using a |
If JS throws an object whose toString() method throws, then Node attempts to print an empty message, but actually prints garbage. This commit checks for this case, and prints a message instead.
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New CI: https://ci.nodejs.org/job/node-test-pull-request/931/ Made the change to |
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CI failures are unrelated. |
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LGTM |
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Thanks, landed in 1ec09b0. |
If JS throws an object whose
toString()method throws, then Node attempts to print an empty message, but actually prints garbage. This commit checks for this case, and prints a newline instead.Closes #4079