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testing/synctest: runtime.SetBlockProfileRate breaks promise with synctest.Wait

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsFixThe path to resolution is known, but the work has not been done.The path to resolution is known, but the work has not been done.

Status: Open.

#76286 In golang/go;

· Darkclainer opened on Nov 12, 2025

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Backlog

cmd/compile: Extra bounds checking when using addition in condition/index

BugReportIssues describing a possible bug in the Go implementation.Issues describing a possible bug in the Go implementation.

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76270 In golang/go;

· fice-t opened on Nov 12, 2025

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Unplanned

cmd/compile: prove only notices one of a pair of induction variables (missed optimization)

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76269 In golang/go;

· dr2chase opened on Nov 11, 2025

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Unplanned

cmd/link, runtime: prominently report use of -checklinkname=0 when there is a runtime problem

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsDecisionFeedback is required from experts, contributors, and/or the community before a change can be made.Feedback is required from experts, contributors, and/or the community before a change can be made.

ToolProposalIssues describing a requested change to a Go tool or command-line program.Issues describing a requested change to a Go tool or command-line program.

Status: Open.

#76242 In golang/go;

· thepudds opened on Nov 10, 2025

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Backlog

runtime: moving invariant code out of function and loop gives small gains in GreenTea GC

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

ImplementationIssues describing a semantics-preserving change to the Go implementation.Issues describing a semantics-preserving change to the Go implementation.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76212 In golang/go;

· archanaravindar opened on Nov 7, 2025

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Backlog

x/tools/internal/imports: SEGV in DirInfoCache.Store (nil SP after mapaccess)

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

gopls/memory-corruption"can't happen" gopls crashes (races, unsafe, miscompile, runtime bugs, faulty HW)"can't happen" gopls crashes (races, unsafe, miscompile, runtime bugs, faulty HW)

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

ToolsThis label describes issues relating to any tools in the x/tools repository.This label describes issues relating to any tools in the x/tools repository.

Status: Open.

#76107 In golang/go;

· adonovan opened on Oct 29, 2025

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Unreleased

runtime: [recovered, repanicked] is displayed for duplicated panics that not recovered.

BugReportIssues describing a possible bug in the Go implementation.Issues describing a possible bug in the Go implementation.

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

Status: Open.

Bug

#76099 In golang/go;

· fengyoulin opened on Oct 29, 2025

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Go1.26

internal/runtime/maps: hash copy of key instead of key itself makes map run slowly

BugReportIssues describing a possible bug in the Go implementation.Issues describing a possible bug in the Go implementation.

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76083 In golang/go;

· spy20051623 opened on Oct 28, 2025

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Unplanned

cmd/compile: exploit disjoint live ranges to reduce frame size

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76073 In golang/go;

· adonovan opened on Oct 27, 2025

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Unplanned

cmd/compile: on <code>AMD64</code> slow instruction sequence to Zext a &lt; register size instruction output

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

FeatureRequestIssues asking for a new feature that does not need a proposal.Issues asking for a new feature that does not need a proposal.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76066 In golang/go;

· Jorropo opened on Oct 27, 2025

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Unplanned

cmd/compile: amd64 <code>CMOV*</code> lowering rules depend on the values schedule

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

Performance

Status: Open.

#76060 In golang/go;

· Jorropo opened on Oct 26, 2025

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Unplanned

runtime: lock ordering problem on Windows reported by GOEXPERIMENT=staticlockranking in syscall_windows.go map use

BugReportIssues describing a possible bug in the Go implementation.Issues describing a possible bug in the Go implementation.

compiler/runtimeIssues related to the Go compiler and/or runtime.Issues related to the Go compiler and/or runtime.

NeedsInvestigationSomeone must examine and confirm this is a valid issue and not a duplicate of an existing one.Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

OS-Windows

Status: Open.

#76058 In golang/go;

· thepudds opened on Oct 26, 2025

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Backlog