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Votes
0
Found in
2018.3.0a1
2018.3.1f1
2019.1.0a1
2019.2.0a1
Issue ID
1117993
Regression
Yes
[WebGL] In developer build method Mathf.CeilToInt() throws an exception
Steps to reproduce:
1. Download 117993_repro.zip project
2. Build for WebGL Developer Build
3. Open index.html in a web browser
Expected results: returns -2147483647 value
Actual results: Mathf.CeilToInt() throws an exception
Reproduced with: 2019.2.0a1, 2019.1.0a14, 2018.3.3f1
Not reproducible in: 2017.4.18f1
Exception:
exception thrown: RuntimeError: integer overflow,_Mathf_CeilToInt_m0230CCC7CC9266F18125D9425C38A25D1CA4275B@blob:null/97ece9de-a606-46b9-a946-c044d7947787 line 1379 > WebAssembly.instantiate:wasm-function[33195]:0x85e16e
_TestCeil_Start_m89B55F5DD7E7290449C2F37AC1F6D50326337F47@blob:null/97ece9de-a606-46b9-a946-c044d7947787 line 1379 > WebAssembly.instantiate:wasm-function[43820]:0xa75090
<...>
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Resolution Note (2019.2.X):
This is not a bug. In development build, we have additional checks for undefined behaviour, like Mathf.CeilToInt(float.PositiveInfinity).
C# says in https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/explicit-numeric-conversions-table
"In a checked context, an OverflowException is thrown, while in an unchecked context, the result is an unspecified value of the destination type."
C++ (that is generated during il2cpp) also doesn't support int overflow.
To solve this please make sure you have correct input for CeilToInt first.