What steps will reproduce the problem?
d91993212194 caused a regression in the compiler which causes it to use large amounts of
memory when compiling expressions like
buf := [1<<30]byte{}
What is the expected output? What do you see instead?
Expected, before
lucky(~/go/test/fixedbugs) % /usr/bin/time -v ~/go/pkg/tool/linux_amd64/6g -o /tmp/foo
bug361.go
Command being timed: "/home/dfc/go/pkg/tool/linux_amd64/6g -o /tmp/foo bug361.go"
User time (seconds): 0.00
System time (seconds): 0.00
Percent of CPU this job got: 66%
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:00.00
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 1776
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 501
Voluntary context switches: 1
Involuntary context switches: 2
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Got:
lucky(~/go/test/fixedbugs) % /usr/bin/time -v ~/go/pkg/tool/linux_amd64/6g -o /tmp/foo
bug361.go
Command being timed: "/home/dfc/go/pkg/tool/linux_amd64/6g -o /tmp/foo bug361.go"
User time (seconds): 0.67
System time (seconds): 0.19
Percent of CPU this job got: 99%
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:00.87
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 612352
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 153188
Voluntary context switches: 1
Involuntary context switches: 76
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
Please use labels and text to provide additional information.
% hg id
ecf3c8d0918c+ tip
This is related to issue #6023 and issue #6033. It was possibly exposed earlier by
https://code.google.com/p/go/source/detail?r=a5eb738ff6490af23ebf7906dd2af0f4bbc19a3e,
but was rolled back.
