System.Text.Json.JsonSerializer.Deserialize crashes when parsing large string using Blazor #41604
Description
This issue has been moved from a ticket on Developer Community.
[severity:Other] [regression] [worked-in:somewhere before 16.7.1]
Using Blazor/Wasm (3.2.0) and trying to parse a large json-string (135123600 chars) loaded from a file on my local windows machine, System.Text.Json.JsonSerializer.Deserialize crashes with the following internal exception (or similar, varies somewhat from run to run):
Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: 'r' is an invalid start of a property name. Expected a '"'. Path: $[4888].ID | LineNumber: 63547 | BytePositionInLine: 0.
System.Text.Json.JsonException: 'r' is an invalid start of a property name. Expected a '"'. Path: $[4888].ID | LineNumber: 63547 | BytePositionInLine: 0. ---> System.Text.Json.JsonReaderException: 'r' is an invalid start of a property name. Expected a '"'. LineNumber: 63547 | BytePositionInLine: 0.
at System.Text.Json.ThrowHelper.ThrowJsonReaderException (System.Text.Json.Utf8JsonReader& json, System.Text.Json.ExceptionResource resource, System.Byte nextByte, System.ReadOnlySpan`1[T] bytes) <0x8575f78 + 0x00020> in :0
at System.Text.Json.Utf8JsonReader.ConsumeNextToken (System.Byte marker) <0x285e1d8 + 0x00264> in :0
at System.Text.Json.Utf8JsonReader.ConsumeNextTokenOrRollback (System.Byte marker) <0x285dfa8 + 0x0003a> in :0
at System.Text.Json.Utf8JsonReader.ReadSingleSegment () <0x2851dd8 + 0x001de> in :0
at System.Text.Json.Utf8JsonReader.Read () <0x2851960 + 0x0000e> in :0
at System.Text.Json.JsonSerializer.ReadCore (System.Text.Json.JsonSerializerOptions options, System.Text.Json.Utf8JsonReader& reader, System.Text.Json.ReadStack& readStack) <0x28799e0 + 0x00060> in :0
Line number of the file and position varies where it fails /(and therefore what is expected (number, string or property name).
The string contains a list of objects like:
[
{
"ID": 0,
"DateTime": "2018-08-09T08:57:34",
"SiteWrapper": null,
"SiteWrapperID": 1,
"Lev": [
40.3,
0,
78.9,
65.6,
55.5
]
},
{
"ID": 0,
"DateTime": "2018-08-09T08:57:35",
"SiteWrapper": null,
"SiteWrapperID": 1,
"Lev": [
70.4,
72.1,
71.2,
0,
64.5
]
},
and so on. (all in all 604621 instances).
(so far tested on Chrome 84.0.4147.135 and Microsoft Edge 44.18362.449.0)
Original Comments
Feedback Bot on 8/27/2020, 01:09 AM:
We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.
Original Solutions
(no solutions)