code	description
S1000	Use plain channel send or receive instead of single-case select
S1001	Replace for loop with call to copy
S1002	Omit comparison with boolean constant
S1003	Replace call to strings.Index with strings.Contains
S1004	Replace call to bytes.Compare with bytes.Equal
S1005	Drop unnecessary use of the blank identifier
S1006	Use 'for { ... }' for infinite loops
S1007	Simplify regular expression by using raw string literal
S1008	Simplify returning boolean expression
S1009	Omit redundant nil check on slices
S1010	Omit default slice index
S1011	Use a single append to concatenate two slices
S1012	Replace time.Now().Sub(x) with time.Since(x)
S1016	Use a type conversion instead of manually copying struct fields
S1017	Replace manual trimming with strings.TrimPrefix
S1018	Use 'copy' for sliding elements
S1019	Simplify 'make' call by omitting redundant arguments
S1020	Omit redundant nil check in type assertion
S1021	Merge variable declaration and assignment
S1023	Omit redundant control flow
S1024	Replace x.Sub(time.Now()) with time.Until(x)
S1025	Don't use fmt.Sprintf("%s", x) unnecessarily
S1028	Simplify error construction with fmt.Errorf
S1029	Range over the string directly
S1030	Use bytes.Buffer.String or bytes.Buffer.Bytes
S1031	Omit redundant nil check around loop
S1032	Use sort.Ints(x), sort.Float64s(x), and sort.Strings(x)
S1033	Unnecessary guard around call to 'delete'
S1034	Use result of type assertion to simplify cases
S1035	Redundant call to net/http.CanonicalHeaderKey in method call on net/http.Header
S1036	Unnecessary guard around map access
S1037	Elaborate way of sleeping
S1038	Unnecessarily complex way of printing formatted string
S1039	Unnecessary use of fmt.Sprint
S1040	Type assertion to current type
SA1000	Invalid regular expression
SA1001	Invalid template
SA1002	Invalid format in time.Parse
SA1003	Unsupported argument to functions in encoding/binary
SA1004	Suspiciously small untyped constant in time.Sleep
SA1005	Invalid first argument to exec.Command
SA1006	Printf with dynamic first argument and no further arguments
SA1007	Invalid URL in net/url.Parse
SA1008	Non-canonical key in http.Header map
SA1010	(*regexp.Regexp).FindAll called with n == 0, which will always return zero results
SA1011	Various methods in the 'strings' package expect valid UTF-8, but invalid input is provided
SA1012	A nil context.Context is being passed to a function, consider using context.TODO instead
SA1013	io.Seeker.Seek is being called with the whence constant as the first argument, but it should be the second
SA1014	Non-pointer value passed to Unmarshal or Decode
SA1015	Using time.Tick in a way that will leak. Consider using time.NewTicker, and only use time.Tick in tests, commands and endless functions
SA1016	Trapping a signal that cannot be trapped
SA1017	Channels used with os/signal.Notify should be buffered
SA1018	strings.Replace called with n == 0, which does nothing
SA1019	Using a deprecated function, variable, constant or field
SA1020	Using an invalid host:port pair with a net.Listen-related function
SA1021	Using bytes.Equal to compare two net.IP
SA1023	Modifying the buffer in an io.Writer implementation
SA1024	A string cutset contains duplicate characters
SA1025	It is not possible to use (*time.Timer).Reset's return value correctly
SA1026	Cannot marshal channels or functions
SA1027	Atomic access to 64-bit variable must be 64-bit aligned
SA1028	sort.Slice can only be used on slices
SA1029	Inappropriate key in call to context.WithValue
SA1030	Invalid argument in call to a strconv function
SA2000	sync.WaitGroup.Add called inside the goroutine, leading to a race condition
SA2001	Empty critical section, did you mean to defer the unlock?
SA2002	Called testing.T.FailNow or SkipNow in a goroutine, which isn't allowed
SA2003	Deferred Lock right after locking, likely meant to defer Unlock instead
SA3000	TestMain doesn't call os.Exit, hiding test failures
SA3001	Assigning to b.N in benchmarks distorts the results
SA4000	Binary operator has identical expressions on both sides
SA4001	&*x gets simplified to x, it does not copy x
SA4003	Comparing unsigned values against negative values is pointless
SA4004	The loop exits unconditionally after one iteration
SA4005	Field assignment that will never be observed. Did you mean to use a pointer receiver?
SA4006	A value assigned to a variable is never read before being overwritten. Forgotten error check or dead code?
SA4008	The variable in the loop condition never changes, are you incrementing the wrong variable?
SA4009	A function argument is overwritten before its first use
SA4010	The result of append will never be observed anywhere
SA4011	Break statement with no effect. Did you mean to break out of an outer loop?
SA4012	Comparing a value against NaN even though no value is equal to NaN
SA4013	Negating a boolean twice (!!b) is the same as writing b. This is either redundant, or a typo.
SA4014	An if/else if chain has repeated conditions and no side-effects; if the condition didn't match the first time, it won't match the second time, either
SA4015	Calling functions like math.Ceil on floats converted from integers doesn't do anything useful
SA4016	Certain bitwise operations, such as x ^ 0, do not do anything useful
SA4017	Discarding the return values of a function without side effects, making the call pointless
SA4018	Self-assignment of variables
SA4019	Multiple, identical build constraints in the same file
SA4020	Unreachable case clause in a type switch
SA4021	'x = append(y)' is equivalent to 'x = y'
SA4022	Comparing the address of a variable against nil
SA4023	Impossible comparison of interface value with untyped nil
SA4024	Checking for impossible return value from a builtin function
SA4025	Integer division of literals that results in zero
SA4026	Go constants cannot express negative zero
SA4027	(*net/url.URL).Query returns a copy, modifying it doesn't change the URL
SA4028	x % 1 is always zero
SA4029	Ineffective attempt at sorting slice
SA4030	Ineffective attempt at generating random number
SA4031	Checking never-nil value against nil
SA5000	Assignment to nil map
SA5001	Deferring Close before checking for a possible error
SA5002	The empty for loop ('for {}') spins and can block the scheduler
SA5003	Defers in infinite loops will never execute
SA5004	'for { select { ...' with an empty default branch spins
SA5005	The finalizer references the finalized object, preventing garbage collection
SA5007	Infinite recursive call
SA5008	Invalid struct tag
SA5009	Invalid Printf call
SA5010	Impossible type assertion
SA5011	Possible nil pointer dereference
SA5012	Passing odd-sized slice to function expecting even size
SA6000	Using regexp.Match or related in a loop, should use regexp.Compile
SA6001	Missing an optimization opportunity when indexing maps by byte slices
SA6002	Storing non-pointer values in sync.Pool allocates memory
SA6003	Converting a string to a slice of runes before ranging over it
SA6005	Inefficient string comparison with strings.ToLower or strings.ToUpper
SA9001	Defers in range loops may not run when you expect them to
SA9002	Using a non-octal os.FileMode that looks like it was meant to be in octal.
SA9003	Empty body in an if or else branch
SA9004	Only the first constant has an explicit type
SA9005	Trying to marshal a struct with no public fields nor custom marshaling
SA9006	Dubious bit shifting of a fixed size integer value
SA9007	Deleting a directory that shouldn't be deleted
SA9008	else branch of a type assertion is probably not reading the right value
ST1000	Incorrect or missing package comment
ST1001	Dot imports are discouraged
ST1003	Poorly chosen identifier
ST1005	Incorrectly formatted error string
ST1006	Poorly chosen receiver name
ST1008	A function's error value should be its last return value
ST1011	Poorly chosen name for variable of type time.Duration
ST1012	Poorly chosen name for error variable
ST1013	Should use constants for HTTP error codes, not magic numbers
ST1015	A switch's default case should be the first or last case
ST1016	Use consistent method receiver names
ST1017	Don't use Yoda conditions
ST1018	Avoid zero-width and control characters in string literals
ST1019	Importing the same package multiple times
ST1020	The documentation of an exported function should start with the function's name
ST1021	The documentation of an exported type should start with type's name
ST1022	The documentation of an exported variable or constant should start with variable's name
ST1023	Redundant type in variable declaration
U1000	Unused code