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Alan Donovan 69e75c8581 runtime: properly frame panic values in tracebacks 
This CL causes the printing of panic values to ensure that all
newlines in the output are immediately followed by a tab, so
that there is no way for a maliciously crafted panic value to
fool a program attempting to parse the traceback into thinking
that the panic value is in fact a goroutine stack.

See https://github.com/golang/go/issues/64590#issuecomment-1932675696

+ release note

Updates #64590
Updates #63455

Change-Id: I5142acb777383c0c122779d984e73879567dc627
Reviewed-on: https://go-review.googlesource.com/c/go/+/581215
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2024-05-08 19:10:41 +00:00

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Runtime

The traceback printed by the runtime after an unhandled panic or other fatal error now indents the second and subsequent lines of the error message (for example, the argument to panic) by a single tab, so that it can be unambiguously distinguished from the stack trace of the first goroutine. See #64590 for discussion.