GROOVY-12425: Refine error message for unclosed type argument

[daniellansun]

https://issues.apache.org/jira/browse/GROOVY-12425

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.6045%. Comparing base (40e59c5) to head (ecdc749).

Additional details and impacted files

@@                Coverage Diff                 @@
##               master      #2944        +/-   ##
==================================================
- Coverage     71.6067%   71.6045%   -0.0022%     
+ Complexity      38062      38058         -4     
==================================================
  Files            1588       1588                
  Lines          137078     137078                
  Branches        25507      25507                
==================================================
- Hits            98157      98154         -3     
  Misses          30014      30014                
- Partials         8907       8910         +3     

Files with missing lines	Coverage Δ
...va/org/apache/groovy/parser/antlr4/AstBuilder.java	87.1124% <100.0000%> (ø)

... and 8 files with indirect coverage changes

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[github-actions]

JMH summary — classic (commit 41302f7)

Speedup vs trailing 90-day baseline on gh-pages. Higher = faster.
1.00 = in line with history. Per-benchmark ratio, geomean within group.
Time-per-op units inverted so direction is consistent. The calibrated
column divides out this runner's speed vs the baseline hardware, as
measured by Groovy-independent pure-Java ruler benchmarks.

Group	Speedup	Calibrated	n
bench	0.959 ×	1.041 ×	124
core	1.331 ×	1.154 ×	108
grails	1.017 ×	1.053 ×	80

No benchmark is ≥1.5× slower than its 90-day baseline.

⚠️ Runner speed differs ≥15% from the historical baseline hardware for: core-ag. Raw speedups are not meaningful for those parts — use the calibrated column.

_{Runner calibration (this run vs baseline hardware): bench 0.93× (27 rulers) · core-ag 1.26× (3 rulers) · core-hz 0.98× (3 rulers) · grails-ad 0.96× (3 rulers) · grails-ez 0.97× (3 rulers)}

_{Baseline: dev/bench/jmh/<part>/classic/data.js on gh-pages, trailing 90 days. Daily dashboard · Per-suite raw data}

[github-actions]

JMH summary — indy (commit 41302f7)

Speedup vs trailing 90-day baseline on gh-pages. Higher = faster.
1.00 = in line with history. Per-benchmark ratio, geomean within group.
Time-per-op units inverted so direction is consistent. The calibrated
column divides out this runner's speed vs the baseline hardware, as
measured by Groovy-independent pure-Java ruler benchmarks.

Group	Speedup	Calibrated	n
bench	1.038 ×	1.108 ×	124
core	3.384 ×	3.556 ×	108
grails	2.527 ×	2.694 ×	80

No benchmark is ≥1.5× slower than its 90-day baseline.

_{Runner calibration (this run vs baseline hardware): bench 0.96× (27 rulers) · core-ag 0.96× (3 rulers) · core-hz 0.94× (3 rulers) · grails-ad 0.97× (3 rulers) · grails-ez 0.91× (3 rulers)}

_{Baseline: dev/bench/jmh/<part>/indy/data.js on gh-pages, trailing 90 days. Daily dashboard · Per-suite raw data}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[testlens-app]

✅ All tests passed ✅

🏷️ Commit: ecdc749
▶️ Tests: 120276 executed
⚪️ Checks: 32/32 completed

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