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-rw-r--r--src/pkg/runtime/extern.go3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/pkg/runtime/extern.go b/src/pkg/runtime/extern.go
index 5fbfe547e..f9c5b8e3d 100644
--- a/src/pkg/runtime/extern.go
+++ b/src/pkg/runtime/extern.go
@@ -20,7 +20,8 @@ func Goexit()
// Caller reports file and line number information about function invocations on
// the calling goroutine's stack. The argument skip is the number of stack frames
-// to ascend, with 0 identifying the caller of Caller. The return values report the
+// to ascend, with 1 identifying the caller of Caller. (For historical reasons the
+// meaning of skip differs between Caller and Callers.) The return values report the
// program counter, file name, and line number within the file of the corresponding
// call. The boolean ok is false if it was not possible to recover the information.
func Caller(skip int) (pc uintptr, file string, line int, ok bool)