[Bug cli/17368] New: Unhelpful error message "Unterminated string in expression."

["ams at sourceware dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17368

            Bug ID: 17368
           Summary: Unhelpful error message "Unterminated string in
                    expression."
           Product: gdb
           Version: 7.7
            Status: NEW
          Severity: minor
          Priority: P2
         Component: cli
          Assignee: unassigned at sourceware dot org
          Reporter: ams at sourceware dot org

Back in GDB 7.2 this syntax used to work fine:

  (gdb) break "15 if i==20"

I've not checked 7.3, but GDB 7.4 rejects it:

  (gdb) break "15 if i==20"
  Unterminated string in expression.

And continues to do so in 7.7.1. Removing the quotes solves the problem, of
course.

I'm not sure why that form was ever accepted, or why my customer was trying to
use it, but the problem is that the error message is not at all helpful.

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