2 @c This is part of the GNU Emacs Lisp Reference Manual.
3 @c Copyright (C) 1990-1993, 1999, 2001-2011 Free Software Foundation, Inc.
4 @c See the file elisp.texi for copying conditions.
5 @setfilename ../../info/errors
6 @node Standard Errors, Standard Buffer-Local Variables, GNU Emacs Internals, Top
7 @appendix Standard Errors
8 @cindex standard errors
10 Here is the complete list of the error symbols in standard Emacs,
11 grouped by concept. The list includes each symbol's message (on the
12 @code{error-message} property of the symbol) and a cross reference to a
13 description of how the error can occur.
15 Each error symbol has an @code{error-conditions} property that is a
16 list of symbols. Normally this list includes the error symbol itself
17 and the symbol @code{error}. Occasionally it includes additional
18 symbols, which are intermediate classifications, narrower than
19 @code{error} but broader than a single error symbol. For example, all
20 the errors in accessing files have the condition @code{file-error}. If
21 we do not say here that a certain error symbol has additional error
22 conditions, that means it has none.
24 As a special exception, the error symbol @code{quit} does not have the
25 condition @code{error}, because quitting is not considered an error.
27 @xref{Errors}, for an explanation of how errors are generated and
39 @item args-out-of-range
40 @code{"Args out of range"}@*
41 This happens when trying to access an element beyond the range of a
43 @xref{Sequences Arrays Vectors}, @xref{Text}.
46 @code{"Arithmetic error"}@*
47 @xref{Arithmetic Operations}.
49 @item beginning-of-buffer
50 @code{"Beginning of buffer"}@*
51 @xref{Character Motion}.
53 @item buffer-read-only
54 @code{"Buffer is read-only"}@*
55 @xref{Read Only Buffers}.
57 @item coding-system-error
58 @code{"Invalid coding system"}@*
59 @xref{Lisp and Coding Systems}.
61 @item cyclic-function-indirection
62 @code{"Symbol's chain of function indirections contains a loop"}@*
63 @xref{Function Indirection}.
65 @item cyclic-variable-indirection
66 @code{"Symbol's chain of variable indirections contains a loop"}@*
67 @xref{Variable Aliases}.
70 @code{"End of buffer"}@*
71 @xref{Character Motion}.
74 @code{"End of file during parsing"}@*
75 Note that this is not a subcategory of @code{file-error},
76 because it pertains to the Lisp reader, not to file I/O.@*
77 @xref{Input Functions}.
79 @item file-already-exists
80 This is a subcategory of @code{file-error}.@*
81 @xref{Writing to Files}.
84 This is a subcategory of @code{file-error}. It occurs when
85 @code{copy-file} tries and fails to set the last-modification time of
87 @xref{Changing Files}.
90 We do not list the error-strings of this error and its subcategories,
91 because the error message is normally constructed from the data items
92 alone when the error condition @code{file-error} is present. Thus,
93 the error-strings are not very relevant. However, these error symbols
94 do have @code{error-message} properties, and if no data is provided,
95 the @code{error-message} property @emph{is} used.@*
99 This is a subcategory of @code{file-error}.@*
102 @item file-supersession
103 This is a subcategory of @code{file-error}.@*
104 @xref{Modification Time}.
107 This is a subcategory of @code{file-error}, which results from problems
108 in accessing a remote file using ftp.@*
109 @xref{Remote Files,,, emacs, The GNU Emacs Manual}.
111 @item invalid-function
112 @code{"Invalid function"}@*
113 @xref{Function Indirection}.
115 @item invalid-read-syntax
116 @code{"Invalid read syntax"}@*
117 @xref{Printed Representation}.
120 @code{"Invalid regexp"}@*
121 @xref{Regular Expressions}.
124 @code{"The mark is not active now"}@*
128 @code{"No catch for tag"}@*
129 @xref{Catch and Throw}.
132 @code{"Scan error"}@*
133 This happens when certain syntax-parsing functions
134 find invalid syntax or mismatched parentheses.@*
135 @xref{List Motion}, and @ref{Parsing Expressions}.
138 @code{"Search failed"}@*
139 @xref{Searching and Matching}.
141 @item setting-constant
142 @code{"Attempt to set a constant symbol"}@*
143 The values of the symbols @code{nil} and @code{t},
144 and any symbols that start with @samp{:},
145 may not be changed.@*
146 @xref{Constant Variables, , Variables that Never Change}.
149 @code{"Text is read-only"}@*
150 This is a subcategory of @code{buffer-read-only}.@*
151 @xref{Special Properties}.
153 @item undefined-color
154 @code{"Undefined color"}@*
158 @code{"Symbol's function definition is void"}@*
159 @xref{Function Cells}.
162 @code{"Symbol's value as variable is void"}@*
163 @xref{Accessing Variables}.
165 @item wrong-number-of-arguments
166 @code{"Wrong number of arguments"}@*
167 @xref{Classifying Lists}.
169 @item wrong-type-argument
170 @code{"Wrong type argument"}@*
171 @xref{Type Predicates}.
174 These kinds of error, which are classified as special cases of
175 @code{arith-error}, can occur on certain systems for invalid use of
176 mathematical functions.
180 @code{"Arithmetic domain error"}@*
181 @xref{Math Functions}.
184 @code{"Arithmetic overflow error"}@*
185 This is a subcategory of @code{domain-error}.@*
186 @xref{Math Functions}.
189 @code{"Arithmetic range error"}@*
190 @xref{Math Functions}.
192 @item singularity-error
193 @code{"Arithmetic singularity error"}@*
194 This is a subcategory of @code{domain-error}.@*
195 @xref{Math Functions}.
197 @item underflow-error
198 @code{"Arithmetic underflow error"}@*
199 This is a subcategory of @code{domain-error}.@*
200 @xref{Math Functions}.