1159905 - Constraint errors at startup

Status: RESOLVED FIXED

(Firefox for iOS :: Browser, defect)

Description

[Brian Nicholson (:bnicholson)]

Seeing these constraint errors at startup:



2015-04-29 14:17:58.992 Client[89560:7671371] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<<SnapKit.LayoutConstraint:0x7faeab42a990> <UIButtonLabel:0x7faeab42b0a0>.width == 18.0>",
    "<NSLayoutConstraint:0x7faeab428dd0 UIButtonLabel:0x7faea9ce5a30'1'.width <= Client.InsetButton:0x7faea9ce56e0'1'.width>",
    "<NSAutoresizingMaskLayoutConstraint:0x7faeab4291e0 h=--& v=--& H:[Client.InsetButton:0x7faea9ce56e0'1'(0)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7faeab428dd0 UIButtonLabel:0x7faea9ce5a30'1'.width <= Client.InsetButton:0x7faea9ce56e0'1'.width>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2015-04-29 14:17:58.993 Client[89560:7671371] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<<SnapKit.LayoutConstraint:0x7faeab42adf0> <UIButtonLabel:0x7faeab429980>.height == 18.0>",
    "<NSLayoutConstraint:0x7faeab428e20 UIButtonLabel:0x7faea9ce5a30'1'.height <= Client.InsetButton:0x7faea9ce56e0'1'.height>",
    "<NSAutoresizingMaskLayoutConstraint:0x7faeab429580 h=--& v=--& V:[Client.InsetButton:0x7faea9ce56e0'1'(0)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7faeab428e20 UIButtonLabel:0x7faea9ce5a30'1'.height <= Client.InsetButton:0x7faea9ce56e0'1'.height>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.



wesj thought this might be related to the new SnackBar constraints from bug 1159319.

Comment 1

[Brian Nicholson (:bnicholson)]

Looks like this is actually a regression from bug 1159765.

Comment 2

[Darrin Henein [:darrin]]

Attachment: PR 403

Comment 3

[Brian Nicholson (:bnicholson)]

Comment on attachment 8599617 [details] [review]
PR 403

Nice, LGTM.