Cannot parse gc log where first line does not have a timestamp

Describe the bug
Log file begins with

 [Times: user=0.45 sys=0.00, real=0.05 secs] 
2021-12-17T19:04:11.194+0000: 302396.015: [GC pause (G1 Evacuation Pause) (young)
Desired survivor size 742391808 bytes, new threshold 15 (max 15)
- age   1:   27289544 bytes,   27289544 total

Parsing silently fails with

Dec 17, 2021 3:05:57 PM com.microsoft.gctoolkit.event.g1gc.G1Trap trap
INFO: Internal EventSource Error @ @0.000
Dec 17, 2021 3:05:57 PM com.microsoft.gctoolkit.parser.PreUnifiedG1GCParser record
WARNING: Parsing Error: Attempt to record Trap @0.0

Removing the first line of the log resolves the issue, but gctoolkit should be able to handle this.

I have asked the originator of this issue to attach the log file here.

To Reproduce
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3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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Start by reproducing the failure with the log excerpt, then trace the G1Trap and PreUnifiedG1GCParser entries named in the error output. Done means a log beginning with the timestamp-free [Times: ...] line parses without the Internal EventSource Error or Trap warning.